Deutsche Bank National Trust				Distribution Date:	8/19/05
Santa Ana, CA 92705	*GMAC*	*Mortgage*	*Corporation*
Attn:

Page 1

GMACM MORTGAGE LOAN TRUST 2005-AR4 GMACM Mortgage Pass-Through Certificates, Series 2005-AR4

Certificateholder Monthly Distribution Summary

			Certificate		Pass				Current		Cumulative
		Class	Rate	Beginning	Through	Principal	Interest	Total	Realized	Ending	Realized
Class	Cusip	Description	Type	Balance	Rate (%)	Distribution	Distribution	Distribution	Losses	Balance	Losses


1-A	76112BUD0	Senior	Fix-30/360	18,476,536.72	4.940879	415,562.37	76,075.30	491,637.67	0.00	18,060,974.35	0.00
2A-1	76112BUE8	Senior	Fix-30/360	55,228,105.73	5.377707	561,909.45	247,500.50	809,409.95	0.00	54,666,196.28	0.00
2A-2	76112BUF5	Senior	Fix-30/360	2,698,836.42	5.377707	27,458.88	12,094.65	39,553.53	0.00	2,671,377.55	0.00
3A-1	76112BUG3	Senior	Fix-30/360	141,720,163.04	5.110321	388,681.59	603,529.62	992,211.21	0.00	141,331,481.45	0.00
3A-2	76112BUH1	Senior	Fix-30/360	6,944,386.34	5.110321	19,045.67	29,573.39	48,619.06	0.00	6,925,340.67	0.00
4A-1	76112BUJ7	Senior	Fix-30/360	52,709,640.46	5.163558	927,629.21	226,807.76	1,154,436.97	0.00	51,782,011.24	0.00
4A-2	76112BUK4	Senior	Fix-30/360	2,590,016.84	5.163558	45,581.33	11,144.77	56,726.10	0.00	2,544,435.51	0.00
5A-1	76112BUL2	Senior	Fix-30/360	78,730,106.61	5.377058	1,454,614.86	352,780.33	1,807,395.19	0.00	77,275,491.75	0.00
5A-2	76112BUM0	Senior	Fix-30/360	3,870,568.87	5.377058	71,512.50	17,343.58	88,856.08	0.00	3,799,056.36	0.00
R	76112BUN8	Senior	Fix-30/360	0.00	4.940879	0.00	0.00	0.00	0.00	0.00	0.00


M-1	76112BUP3	Mezzanine	Fix-30/360	6,369,202.65	5.213163	812.00	27,669.75	28,481.75	0.00	6,368,390.65	0.00
M-2	76112BUQ1	Mezzanine	Fix-30/360	4,439,444.23	5.213163	565.98	19,286.29	19,852.27	0.00	4,438,878.26	0.00
M-3	76112BUR9	Mezzanine	Fix-30/360	2,701,661.78	5.213163	344.43	11,736.84	12,081.27	0.00	2,701,317.35	0.00
B-1	76112BUS7	Junior	Fix-30/360	2,123,734.13	5.213163	270.75	9,226.14	9,496.89	0.00	2,123,463.38	0.00
B-2	76112BUT5	Junior	Fix-30/360	1,350,830.89	5.213163	172.22	5,868.42	6,040.64	0.00	1,350,658.68	0.00
B-3	76112BUU2	Junior	Fix-30/360	965,392.71	5.213163	123.08	4,193.96	4,317.04	0.00	965,269.64	0.00


Totals				380,918,627.42		3,914,284.32	1,654,831.30	5,569,115.62	0.00	377,004,343.12	0.00

Deutsche Bank National Trust				Distribution Date:	8/19/05
Santa Ana, CA 92705	*GMAC*	*Mortgage*	*Corporation*
Attn:

Page 2

GMACM MORTGAGE LOAN TRUST 2005-AR4 GMACM Mortgage Pass-Through Certificates, Series 2005-AR4

Principal Distribution Detail

		Original	Beginning	Scheduled		Unscheduled	Net	Current	Ending	Ending
		Certificate	Certificate	Principal	Accretion	Principal	Principal	Realized	Certificate	Certificate
Class	Cusip	Balance	Balance	Distribution	Principal	Adjustments	Distribution	Losses	Balance	Factor


1-A	76112BUD0	18,893,000.00	18,476,536.72	415,562.37	0.00	0.00	415,562.37	0.00	18,060,974.35	0.95596116812
2A-1	76112BUE8	56,050,000.00	55,228,105.73	561,909.45	0.00	0.00	561,909.45	0.00	54,666,196.28	0.97531126274
2A-2	76112BUF5	2,739,000.00	2,698,836.42	27,458.88	0.00	0.00	27,458.88	0.00	2,671,377.55	0.97531126274
3A-1	76112BUG3	144,100,000.00	141,720,163.04	388,681.59	0.00	0.00	388,681.59	0.00	141,331,481.45	0.98078751871
3A-2	76112BUH1	7,061,000.00	6,944,386.34	19,045.67	0.00	0.00	19,045.67	0.00	6,925,340.67	0.98078751871
4A-1	76112BUJ7	52,750,000.00	52,709,640.46	927,629.21	0.00	0.00	927,629.21	0.00	51,782,011.24	0.98164950220
4A-2	76112BUK4	2,592,000.00	2,590,016.84	45,581.33	0.00	0.00	45,581.33	0.00	2,544,435.51	0.98164950220
5A-1	76112BUL2	80,000,000.00	78,730,106.61	1,454,614.86	0.00	0.00	1,454,614.86	0.00	77,275,491.75	0.96594364685
5A-2	76112BUM0	3,933,000.00	3,870,568.87	71,512.50	0.00	0.00	71,512.50	0.00	3,799,056.36	0.96594364685
R	76112BUN8	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00000000000


M-1	76112BUP3	6,370,000.00	6,369,202.65	812.00	0.00	0.00	812.00	0.00	6,368,390.65	0.99974735501
M-2	76112BUQ1	4,440,000.00	4,439,444.23	565.98	0.00	0.00	565.98	0.00	4,438,878.26	0.99974735501
M-3	76112BUR9	2,702,000.00	2,701,661.78	344.43	0.00	0.00	344.43	0.00	2,701,317.35	0.99974735501
B-1	76112BUS7	2,124,000.00	2,123,734.13	270.75	0.00	0.00	270.75	0.00	2,123,463.38	0.99974735501
B-2	76112BUT5	1,351,000.00	1,350,830.89	172.22	0.00	0.00	172.22	0.00	1,350,658.68	0.99974735501
B-3	76112BUU2	965,513.57	965,392.71	123.08	0.00	0.00	123.08	0.00	965,269.64	0.99974735501


Totals		386,070,613.57	380,918,627.42	3,914,284.32	0.00	0.00	3,914,284.32	0.00	377,004,343.12

Page 3

Deutsche Bank National Trust				Distribution Date:	8/19/05
Santa Ana, CA 92705	*GMAC*	*Mortgage*	*Corporation*
Attn:

GMACM MORTGAGE LOAN TRUST 2005-AR4 GMACM Mortgage Pass-Through Certificates, Series 2005-AR4

Interest Distribution Detail

	Beginning	Pass	Accrued	Cumulative		Total	Net	Unscheduled
	Certificate	Through	Optimal	Unpaid	Deferred	Interest	Prepayment	Interest	Interest
Class	Balance	Rate (%)	Interest	Interest	Interest	Due	Int Shortfall	Adjustment	Paid


1-A	18,476,536.72	4.940879	76,075.30	0.00	0.00	76,075.30	0.00	0.00	76,075.30
2A-1	55,228,105.73	5.377707	247,500.50	0.00	0.00	247,500.50	0.00	0.00	247,500.50
2A-2	2,698,836.42	5.377707	12,094.65	0.00	0.00	12,094.65	0.00	0.00	12,094.65
3A-1	141,720,163.04	5.110321	603,529.62	0.00	0.00	603,529.62	0.00	0.00	603,529.62
3A-2	6,944,386.34	5.110321	29,573.39	0.00	0.00	29,573.39	0.00	0.00	29,573.39
4A-1	52,709,640.46	5.163558	226,807.76	0.00	0.00	226,807.76	0.00	0.00	226,807.76
4A-2	2,590,016.84	5.163558	11,144.77	0.00	0.00	11,144.77	0.00	0.00	11,144.77
5A-1	78,730,106.61	5.377058	352,780.33	0.00	0.00	352,780.33	0.00	0.00	352,780.33
5A-2	3,870,568.87	5.377058	17,343.58	0.00	0.00	17,343.58	0.00	0.00	17,343.58
R	0.00	4.940879	0.00	0.00	0.00	0.00	0.00	0.00	0.00


M-1	6,369,202.65	5.213163	27,669.75	0.00	0.00	27,669.75	0.00	0.00	27,669.75
M-2	4,439,444.23	5.213163	19,286.29	0.00	0.00	19,286.29	0.00	0.00	19,286.29
M-3	2,701,661.78	5.213163	11,736.84	0.00	0.00	11,736.84	0.00	0.00	11,736.84
B-1	2,123,734.13	5.213163	9,226.14	0.00	0.00	9,226.14	0.00	0.00	9,226.14
B-2	1,350,830.89	5.213163	5,868.42	0.00	0.00	5,868.42	0.00	0.00	5,868.42
B-3	965,392.71	5.213163	4,193.96	0.00	0.00	4,193.96	0.00	0.00	4,193.96


Totals	380,918,627.42		1,654,831.30	0.00	0.00	1,654,831.30	0.00	0.00	1,654,831.30

Page 4

Deutsche Bank National Trust				Distribution Date:	8/19/05
Santa Ana, CA 92705	*GMAC*	*Mortgage*	*Corporation*
Attn:

GMACM MORTGAGE LOAN TRUST 2005-AR4 GMACM Mortgage Pass-Through Certificates, Series 2005-AR4

Current Payment Information
Factors per $1,000

		Original	Beginning Cert.			Ending Cert.	Pass
		Certificate	Notional	Principal	Interest	Notional	Through
Class	Cusip	Balance	Balance	Distribution	Distribution	Balance	Rate (%)


1-A	76112BUD0	18,893,000.00	977.956741762	21.995573644	4.026639496	955.961168118	4.940879
2A-1	76112BUE8	56,050,000.00	985.336409022	10.025146279	4.415709188	975.311262743	5.377707
2A-2	76112BUF5	2,739,000.00	985.336409022	10.025146279	4.415717415	975.311262743	5.377707
3A-1	76112BUG3	144,100,000.00	983.484823294	2.697304581	4.188269396	980.787518714	5.110321
3A-2	76112BUH1	7,061,000.00	983.484823294	2.697304581	4.188272199	980.787518714	5.110321
4A-1	76112BUJ7	52,750,000.00	999.234890147	17.585387947	4.299673175	981.649502200	5.163558
4A-2	76112BUK4	2,592,000.00	999.234890147	17.585387947	4.299679784	981.649502200	5.163558
5A-1	76112BUL2	80,000,000.00	984.126332623	18.182685775	4.409754125	965.943646848	5.377058
5A-2	76112BUM0	3,933,000.00	984.126332623	18.182685775	4.409758454	965.943646848	5.377058
R	76112BUN8	100.00	0.000000000	0.000000000	0.000000000	0.000000000	4.940879


M-1	76112BUP3	6,370,000.00	999.874827409	0.127472396	4.343759812	999.747355013	5.213163
M-2	76112BUQ1	4,440,000.00	999.874827409	0.127472396	4.343759009	999.747355013	5.213163
M-3	76112BUR9	2,702,000.00	999.874827409	0.127472396	4.343760178	999.747355013	5.213163
B-1	76112BUS7	2,124,000.00	999.874827409	0.127472396	4.343757062	999.747355013	5.213163
B-2	76112BUT5	1,351,000.00	999.874827409	0.127472396	4.343760178	999.747355013	5.213163
B-3	76112BUU2	965,513.57	999.874827409	0.127472396	4.343760803	999.747355013	5.213163


Totals		386,070,613.57	986.655326852	10.138778199	4.286343591	976.516548706

GMACM MORTGAGE LOAN TRUST 2005-AR4 8-K