UNITEDTable STATES SECURITIESof AND EXCHANGE COMMISSION Contents

~~Washington,~~UNITED ~~D.C.~~STATES SECURITIES ~~20549~~AND EXCHANGE COMMISSION

~~FORM~~Washington, ~~8-K~~D.C. 20549

~~CURRENT~~FORM ~~REPORT~~8-K ~~Pursuant to Section 13 OR 15(d) of~~ ~~The Securities Exchange Act of 1934~~

~~Date~~CURRENT ofREPORT Pursuant ~~Report~~to Section 13 OR 15(~~Date~~d) of ~~earliest~~The ~~event~~Securities ~~reported)~~Exchange ~~September 15,~~Act ~~2004~~of 1934

~~Principal~~Date ~~Life~~of ~~Insurance~~Report ~~Company on~~(Date ~~behalf~~ of ~~Principal~~earliest ~~Life~~event ~~Income~~reported) ~~Fundings~~December 15, ~~Trust~~ 2004~~-15~~

~~(Exact~~Principal ~~name~~Life Insurance Company on behalf of ~~registrant~~Principal asLife ~~specified~~Income inFundings ~~its~~Trust ~~charter)~~2004-15

~~Iowa~~ (~~State~~Exact orname ~~other jurisdiction~~ of ~~incorporation)~~registrant ~~333-110499-23~~as ~~(Commission~~specified ~~File~~in ~~Number)~~its ~~42-0127290 (IRS Employer Identification No.~~charter)

711 High Street, Des Moines, Iowa (Address of principal executive offices) 50392-0001 (Zip Code)


Iowa	333-110499-23	42-0127290
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)

Registrant’s telephone number, including area code: (515) 247-1111


711 High Street, Des Moines, Iowa		50392-0001
(Address of principal executive offices)		(Zip Code)

~~Not~~Registrant’s ~~Applicable (Former~~telephone ~~name or former address~~number, ifincluding ~~changed~~area ~~since~~code: ~~last report.~~(515) 247-1111

~~Check~~Not ~~the appropriate box below if the Form 8-K filing is intended to~~Applicable ~~simultaneously~~(Former ~~satisfy~~name ~~the~~or ~~filing~~former ~~obligation~~address, ofif ~~the~~changed ~~registrant~~since ~~under~~last ~~any of the following provisions (see General Instruction A~~report.~~2. below~~):

oCheck ~~Written~~the ~~communications~~appropriate ~~pursuant~~box tobelow ~~Rule~~if ~~425 under~~ the ~~Securities~~Form ~~Act~~8-K ~~(17~~filing ~~CFR~~is ~~230.425)~~intended ~~o Soliciting material pursuant~~ to ~~Rule~~simultaneously ~~14a-12~~satisfy ~~under~~ the filing ~~Exchange~~obligation ~~Act~~of ~~(17~~the ~~CFR~~registrant ~~240.14a-12)~~under oany ~~Pre-commencement~~of ~~communications pursuant to Rule 14d-2(b) under~~ the ~~Exchange~~following ~~Act~~provisions (17see ~~CFR~~General ~~240~~Instruction A.~~14d-~~2~~(b))~~. ~~o Pre-commencement communications pursuant to Rule 13e-4(c~~below) ~~under the Exchange Act (17 CFR 240.13e-4(c))~~:


o	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


o	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


o	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


o	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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	Item 8.01 Other Events.
	Item 9.01 Financial Statements and Exhibits.
SIGNATURES
EXHIBIT INDEX
Indenture

Item 8.01 Other Events.

On ~~September~~December 15, 2004, a payment was made to the holders of the notes issued by the Principal Life Income Fundings Trust 2004-15 (the “Trust”). Specific information with respect to the payment is filed as Exhibit 99.1 hereto. No other reportable transactions or matters have occurred during the current reporting period.

The Trust’s assets consist of a Funding Agreement issued by Principal Life Insurance Company (“Principal Life”) and a Guarantee issued by Principal Financial Group, Inc. (“PFG”) which fully and unconditionally guarantees the payment obligations of Principal Life under the Funding Agreement. PFG is subject to the informational requirements of the Securities Act of 1934, and in accordance with those requirements files periodic and current reports and other information (including financial information) with the Securities and Exchange Commission (“SEC”). You can read and copy any reports or other information PFG files at the SEC public reference room at 450 Fifth Street, N.W., Washington, D.C. 20549. You can also request copies of PFG’s documents upon payment of a duplicating fee, by writing the SEC’s public reference room. You can obtain information regarding the public reference room by calling the SEC at 1-800-SEC-0330. PFG’s filings are available to the public from commercial document retrieval services or over the internet at http://www/sec/gov.

Item 9.01 Financial Statements and Exhibits.

(c)		Exhibits
Exhibit 99.1		Indenture Trustee’s report in respect of the September 15, 2004 payment to holders of the notes issued by the Principal Life Income Fundings Trust 2004-15.

(c)

Exhibits

~~SIGNATURES~~ Exhibit 99.1 Indenture Trustee’s report in respect of the December 15, 2004 payment to holders of the notes issued by the Principal Life Income Fundings Trust 2004-15.

PursuantTable to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Contents

	PRINCIPAL LIFE INSURANCE COMPANY (Registrant)
Date: September 22, 2004	By:	/s/ Karen A. Pearston
		Name:	Karen A. Pearston
		Title:	Second Vice President and Counsel

SIGNATURES

~~EXHIBIT~~ Pursuant ~~INDEX~~to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit
	PRINCIPAL LIFE INSURANCE COMPANY (Registrant)
Number		Description
Date: December 29, 2004	By:	/s/ Karen A.Pearston
Exhibit 99.1		Indenture Trustee’s report in respect of the September 15, 2004 payment to holders of the notes issued by the Principal Life Income Fundings Trust 2004-15.
	Name:	Karen A. Pearston
	Title:	Second Vice President and Counsel

EXHIBIT INDEX


Exhibit
Number		Description
Exhibit 99.1		Indenture Trustee’s report in respect of the December 15, 2004 payment to holders of the notes issued by the Principal Life Income Fundings Trust 2004-15.

UNITEDTable STATES SECURITIESof AND EXCHANGE COMMISSION Contents

Table of Contents

PursuantTable to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Contents

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Filing Compare · PRINCIPAL LIFE INCOME FUNDINGS TRUST 2004-15