Structured Asset Securities Corporation  Mortgage Pass-Through Certificates, Series
2004-12H
Distribution Date:          11/26/2004
Record Date:                10/29/2004

Distribution Summary

DISTRIBUTION IN DOLLARS

                                                  Prior         Pass-                                                                                  Current
                            Original              Principal     Through       Interest   Principal   Total          Deferred               Realized    Principal
Class                       Balance               Balance       Rate          DistributedDistributed Distributed    Interest               Loss        Balance
(1)                         (2)                   (3)           (4)           (5)        (6)         (7)=(5+6)      (8)                    (9)         (10)=(3-6+8-9)

A1I                         137,933,000.00        127,015,431.486.000000%     635,077.16 2,966,686.663,601,763.82   0.00                   0.00        124,048,744.82

APOI                        4,239,312.00          3,986,581.55  0.000000%     0.00       78,794.34   78,794.34      0.00                   0.00        3,907,787.21

A1II                        26,365,000.00         23,985,458.83 5.603977%     112,011.64 1,403,461.081,515,472.72   0.00                   0.00        22,581,997.75

B1I                         1,393,000.00          1,386,214.08  6.000000%     6,931.07   1,390.69    8,321.76       0.00                   0.00        1,384,823.39

B2I                         1,173,000.00          1,167,285.80  6.000000%     5,836.43   1,171.05    7,007.48       0.00                   0.00        1,166,114.75

B1II                        258,000.00            256,754.04    5.603977%     1,199.04   253.56      1,452.60       0.00                   0.00        256,500.48

B2II                        218,000.00            216,947.21    5.603977%     1,013.14   214.24      1,227.38       0.00                   0.00        216,732.97

B3                          956,000.00            951,349.22    5.938003%     4,707.60   952.08      5,659.68       0.00                   0.00        950,397.14

B4                          522,000.00            519,460.55    5.938003%     2,570.47   519.86      3,090.33       0.00                   0.00        518,940.69

B5                          261,000.00            259,730.29    5.938003%     1,285.23   259.93      1,545.16       0.00                   0.00        259,470.36

B6                          522,009.00            519,469.87    5.938003%     2,570.51   519.76      3,090.27       0.00                   0.00        518,950.11

R                           100.00                0.00          6.000000%     0.00       0.00        0.00           0.00                   0.00        0.00

Totals                      173,840,421.00        160,264,682.92              773,202.29 4,454,223.255,227,425.54   0.00                   0.00        153,562,701.37

Notional Classes

AIOI                        26,435,000.00         23,311,584.54 1.000000%     19,426.32  0.00        19,426.32      0.00                   0.00        22,564,688.91

Distribution Summary (Factors)

PER $1,000 OF ORIGINAL BALANCE

                                                  Prior                                                                                    Current
                                                  Principal     Interest      Principal  Total       Deferred       Realized               Principal
                                                                Distributed
Class                       CUSIP                 Balance       (5/2 x 1000)  DistributedDistributed Interest       Loss                   Balance
                                                  (3/2 x 1000)                (6/2 x     (7/2 x 1000)(8/2 x 1000)   (9/2 x 1000)           (10/2 x
                                                                              1000)                                                        1000)

A1I                         86359BUP4             920.848756    4.604244      21.508172  26.112416   0.000000       0.000000               899.340584

APOI                        86359BUR0             940.384088    0.000000      18.586587  18.586587   0.000000       0.000000               921.797502

A1II                        86359BUS8             909.746210    4.248498      53.231977  57.480475   0.000000       0.000000               856.514233

B1I                         86359BUT6             995.128557    4.975642      0.998342   5.973984    0.000000       0.000000               994.130215

B2I                         86359BUU3             995.128559    4.975644      0.998338   5.973981    0.000000       0.000000               994.130222

B1II                        86359BUV1             995.170698    4.647442      0.982791   5.630233    0.000000       0.000000               994.187907

B2II                        86359BUW9             995.170688    4.647431      0.982752   5.630183    0.000000       0.000000               994.187936

B3                          86359BUX7             995.135167    4.924268      0.995900   5.920167    0.000000       0.000000               994.139268

B4                          86359BUZ2             995.135153    4.924272      0.995900   5.920172    0.000000       0.000000               994.139253

B5                          86359BVA6             995.135211    4.924253      0.995900   5.920153    0.000000       0.000000               994.139310

B6                          86359BVB4             995.135850    4.924264      0.995692   5.919955    0.000000       0.000000               994.140159

R                           86359BUY5             0.000000      0.000000      0.000000   0.000000    0.000000       0.000000               0.000000

AIOI                        86359BUQ2             881.845453    0.734871      0.000000   0.734871    0.000000       0.000000               853.591409

Interest Distribution Detail

DISTRIBUTION IN DOLLARS

                            Prior                 Pass-         Optimal       Prior      Non-Recov                                                     Current
                            Principal             Through       Accrued       Unpaid     Interest    Interest       Deferred               Interest    Unpaid
                                                                                                                                           Distributed
Class                       Balance               Rate          Interest      Interest   Shortfall   Due            Interest               (9)         Interest
(1)                         (2)                   (3)           (4)           (5)        (6)         (7)=(4)+(5)-(6)(8)                                (10)=(7)-(8)-(9)

A1I                         127,015,431.48        6.000000%     635,077.16    0.00       0.00        635,077.16     0.00                   635,077.16  0.00

APOI                        3,986,581.55          0.000000%     0.00          0.00       0.00        0.00           0.00                   0.00        0.00

A1II                        23,985,458.83         5.603977%     112,011.64    0.00       0.00        112,011.64     0.00                   112,011.64  0.00

B1I                         1,386,214.08          6.000000%     6,931.07      0.00       0.00        6,931.07       0.00                   6,931.07    0.00

B2I                         1,167,285.80          6.000000%     5,836.43      0.00       0.00        5,836.43       0.00                   5,836.43    0.00

B1II                        256,754.04            5.603977%     1,199.04      0.00       0.00        1,199.04       0.00                   1,199.04    0.00

B2II                        216,947.21            5.603977%     1,013.14      0.00       0.00        1,013.14       0.00                   1,013.14    0.00

B3                          951,349.22            5.938003%     4,707.60      0.00       0.00        4,707.60       0.00                   4,707.60    0.00

B4                          519,460.55            5.938003%     2,570.47      0.00       0.00        2,570.47       0.00                   2,570.47    0.00

B5                          259,730.29            5.938003%     1,285.23      0.00       0.00        1,285.23       0.00                   1,285.23    0.00

B6                          519,469.87            5.938003%     2,570.51      0.00       0.00        2,570.51       0.00                   2,570.51    0.00

R                           0.00                  6.000000%     0.00          0.00       0.00        0.00           0.00                   0.00        0.00

  Totals                    160,264,682.92                      773,202.29    0.00       0.00        773,202.29     0.00                   773,202.29  0.00

Notional Classes

AIOI                        23,311,584.54         1.000000%     19,426.32     0.00       0.00        19,426.32      0.00                   19,426.32   0.00

Principal Distribution
Detail

DISTRIBUTION IN DOLLARS

                                                  Prior                                  Current     Current        Current                Cumulative
                            Original              Principal     Principal     Accreted   Realized    Principal      Principal              Realized
Class                       Balance               Balance       Distribution  Principal  Losses      Recoveries     Balance                Losses
(1)                         (2)                   (3)           (4)           (5)        (6)         (7)            (8)=(3)-(4)+(5)-(6)+(7)(9)

A1I                         137,933,000.00        127,015,431.482,966,686.66  0.00       0.00        0.00           124,048,744.82         0.00

APOI                        4,239,312.00          3,986,581.55  78,794.34     0.00       0.00        0.00           3,907,787.21           0.00

A1II                        26,365,000.00         23,985,458.83 1,403,461.08  0.00       0.00        0.00           22,581,997.75          0.00

B1I                         1,393,000.00          1,386,214.08  1,390.69      0.00       0.00        0.00           1,384,823.39           0.00

B2I                         1,173,000.00          1,167,285.80  1,171.05      0.00       0.00        0.00           1,166,114.75           0.00

B1II                        258,000.00            256,754.04    253.56        0.00       0.00        0.00           256,500.48             0.00

B2II                        218,000.00            216,947.21    214.24        0.00       0.00        0.00           216,732.97             0.00

B3                          956,000.00            951,349.22    952.08        0.00       0.00        0.00           950,397.14             0.00

B4                          522,000.00            519,460.55    519.86        0.00       0.00        0.00           518,940.69             0.00

B5                          261,000.00            259,730.29    259.93        0.00       0.00        0.00           259,470.36             0.00

B6                          522,009.00            519,469.87    519.76        0.00       0.00        0.00           518,950.11             0.00

R                           100.00                0.00          0.00          0.00       0.00        0.00           0.00                   0.00

  Totals                    172,535,312.00        160,264,682.924,454,223.25  766,776.08 4,452,923.700.00           155,810,459.67         0.00

Collateral Summary - Group 1

ASSET CHARACTERISTICS

                            Cut-Off               Prior         Current

Aggregate Stated Principal
Balance                     146,645,475.89        135,453,286.66132,403,340.03

Loan Count                  1,173                 1,099         1,078

Weighted Average Coupon Rate
(WAC)                       6.618741%             6.602959%     N/A

Net Weighted Average Coupon
Rate (Net WAC)              6.362241%             5.995512%     N/A

Weighted Average Maturity
(WAM in months)             0                     347           346

AVAILABLE PRINCIPAL         AVAILABLE INTEREST

PO Principal                Total Principal
Scheduled Interest          745,327.09
609.52                      22,189.73
Less:                       Master Servicing Fees 0.00
Sub Servicing Fees          28,219.57
Trustee Fees                733.79
Insurance Fees              39,614.01
Uncompensated PPIS          0.00
Relief Act Shortfall        0.00
Other Interest Reductions   0.00
0.00                        0.00
TOTAL AVAILABLE INTEREST    676,759.72

Collateral Summary - Group 2

ASSET CHARACTERISTICS

                            Cut-Off               Prior         Current

Aggregate Stated Principal
Balance                     27,194,946.05         24,811,396.82 23,407,120.09

Loan Count                  155                   145           136

Weighted Average Coupon Rate
(WAC)                       6.529476%             6.552501%     N/A

Net Weighted Average Coupon
Rate (Net WAC)              6.147976%             5.603977%     N/A

Weighted Average Maturity
(WAM in months)             0                     348           347

AVAILABLE PRINCIPAL         AVAILABLE INTEREST

Scheduled Interest          135,480.58
Curtailments                -1,765.47
Less:                       Master Servicing Fees 0.00
Sub Servicing Fees          7,753.57
Insurance Fees              11,723.87
Trustee Fees                134.36
Uncompensated PPIS          0.00
Relief Act Shortfall        0.00
Other Interest Reductions   0.00
Current Realized Losses     0.00
TOTAL AVAILABLE INTEREST    115,868.78

Delinquency Information

 GROUP 1

                            1 Month               2 Months      3+ Months     Totals

Delinquency

Scheduled Principal Balance 455,806.27            91,569.86     0.00          547,376.13
Percentage of Total Pool
Balance                     0.3443%               0.0692%       0.0000%       0.4134%
Number of Loans             5                     1             0             6

Percentage of Total Loans   0.4638%               0.0928%       0.0000%       0.5566%
Bankruptcy

Scheduled Principal Balance                       0.00          0.00          0.00       0.00
Percentage of Total Pool Balance                  0.0000%       0.0000%       0.0000%    0.0000%

Number of Loans                                   0             0             0          0
Percentage of Total Loans                         0.0000%       0.0000%       0.0000%    0.0000%

Foreclosure

Scheduled Principal Balance                       0.00          0.00          78,859.97  78,859.97
Percentage of Total Pool Balance                  0.0000%       0.0000%       0.0596%    0.0596%

Number of Loans                                   0             0             1          1
Percentage of Total Loans                         0.0000%       0.0000%       0.0928%    0.0928%

REO

Scheduled Principal Balance                       0.00          0.00          0.00       0.00
Percentage of Total Pool Balance                  0.0000%       0.0000%       0.0000%    0.0000%

Number of Loans                                   0             0             0          0
Percentage of Total Loans                         0.0000%       0.0000%       0.0000%    0.0000%

Total

Scheduled Principal Balance                       455,806.27    91,569.86     78,859.97  626,236.10
Percentage of Total Pool Balance                  0.3443%       0.0692%       0.0596%    0.4730%

Number of Loans                                   5             1             1          7
Percentage of Total Loans                         0.4638%       0.0928%       0.0928%    0.6494%

Principal and Interest
Advances                    533,429.19

Delinquency Information

 GROUP 2

Less Than
1 Month                     1 Month               2 Months      3+ Months     Totals

Delinquency

Scheduled Principal Balance 0.00                  0.00          0.00          0.00
Percentage of Total Pool
Balance                     0.0000%               0.0000%       0.0000%       0.0000%
Number of Loans             0                     0             0             0

Percentage of Total Loans   0.0000%               0.0000%       0.0000%       0.0000%
Bankruptcy

Scheduled Principal Balance 65,014.84             0.00          0.00          0.00       65,014.84
Percentage of Total Pool
Balance                     0.2778%               0.0000%       0.0000%       0.0000%    0.2778%

Number of Loans             1                     0             0             0          1
Percentage of Total Loans   0.7353%               0.0000%       0.0000%       0.0000%    0.7353%

Foreclosure

Scheduled Principal Balance                       0.00          0.00          0.00       0.00
Percentage of Total Pool Balance                  0.0000%       0.0000%       0.0000%    0.0000%

Number of Loans                                   0             0             0          0
Percentage of Total Loans                         0.0000%       0.0000%       0.0000%    0.0000%

REO

Scheduled Principal Balance                       0.00          0.00          0.00       0.00
Percentage of Total Pool Balance                  0.0000%       0.0000%       0.0000%    0.0000%

Number of Loans                                   0             0             0          0
Percentage of Total Loans                         0.0000%       0.0000%       0.0000%    0.0000%

Total

Scheduled Principal Balance 65,014.84             0.00          0.00          0.00       65,014.84
Percentage of Total Pool
Balance                     0.2778%               0.0000%       0.0000%       0.0000%    0.2778%

Number of Loans             1                     0             0             0          1
Percentage of Total Loans   0.7353%               0.0000%       0.0000%       0.0000%    0.7353%

Principal and Interest
Advances                    84,597.44

Other Information

          Current Bankruptcy
Loss                        0.00
          Cumulative
Bankruptcy Loss             0.00
          Remaining
Bankruptcy Loss Limit       104,276.00

          Current Fraud Loss0.00
          Cumulative Fraud
Loss                        0.00
          Remaining Fraud
Loss Limit                  3,476,808.00

          Current Special
Hazard Loss Limit           0.00
          Cumulative Special
Hazard Loss Limit           0.00
          Remaining Special
Hazard Loss Limit           1,825,324.00

CONTACT INFORMATION         CONTENTS

Distribution Summary        2
Depositor                   Structured Asset
                            Securities Corporation
Distribution Summary
(Factors)                   2

New York, NY  10019
Interest Distribution       2
Underwriter                 Lehman Brothers
745 Seventh Avenue, 7th
Floor
Principal Distribution      2
New York, NY  10019

Collateral Summary          1
2530 South Parker Road, Suite 601

Delinquency Information     2

Trustee                     Citibank, N.A.
Other Information           2

New York, NY  10013

Deal Contact:               Karen Schluter        Citibank, N.A.
karen.schluter@citigroup.com                      Agency and
                                                  Trust
                                                  388 Greenwich
Tel: (212) 816-5827                               Street, 14th
                                                  Floor
Fax: (212) 816-5527                               New York, NY
                                                  10013

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Structured Asset Securities Corportion 8-K