-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 ILmFjYf6SpyV7o4iBuBn6Nc6tvqlZJFTtIyb3K2BY2+/mXroT/K65us+vzyZUpB+
 PQyqiyg5222M2qor1HybsA==

<SEC-DOCUMENT>0000831655-04-000006.txt : 20040803
<SEC-HEADER>0000831655-04-000006.hdr.sgml : 20040803
<ACCEPTANCE-DATETIME>20040803093808
ACCESSION NUMBER:		0000831655-04-000006
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20040802
FILED AS OF DATE:		20040803

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Wesneski Mary Ellen
		CENTRAL INDEX KEY:			0001298618

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05531
		FILM NUMBER:		04946760

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		413-226-1206

	MAIL ADDRESS:	
		STREET 1:		1500 MAIN STREET
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASSMUTUAL PARTICIPATION INVESTORS
		CENTRAL INDEX KEY:			0000831655
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				043025730
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1295 STATE STREET
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01111
		BUSINESS PHONE:		4137446118

	MAIL ADDRESS:	
		STREET 1:		1295 STATE STREET
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01111

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MASSMUTUAL CORPORATE INVESTORS II
		DATE OF NAME CHANGE:	19880417
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>wes6.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-08-02</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000831655</issuerCik>
        <issuerName>MASSMUTUAL PARTICIPATION INVESTORS</issuerName>
        <issuerTradingSymbol>MPV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001298618</rptOwnerCik>
            <rptOwnerName>Wesneski Mary Ellen</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>BABSON CAPITAL MANAGEMENT LLC</rptOwnerStreet1>
            <rptOwnerStreet2>1500 MAIN STREET</rptOwnerStreet2>
            <rptOwnerCity>SPRINGFIELD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01115</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Compliance Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>No securities are beneficially owned.</remarks>

    <ownerSignature>
        <signatureName>By: Rosemary Baker as Attorney-in-fact for</signatureName>
        <signatureDate>2004-08-03</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>wesnsekipoa.txt
<TEXT>
                  SEC Form 3, Form 4 and Form 5 and Application for
                                 EDGAR Access (Form ID)
                        Confirmation of Authority to Sign

Pursuant to Instruction 7 to SEC "Form 3 - Initial Statement of Beneficial
Ownership of Securities," "Form 4 - Statement of Changes in Beneficial
Ownership" and "Form 5 - Annual Statement of Beneficial Ownership of Securities"
the undersigned, being the Chief Compliance Officer of MassMutual Corporate
Investors and MassMutual Participation Investors (each, a "Trust"), hereby
appoint and designate (i) Rosemary Baker (ii) Jean Bradley (iii) John Mulkern,
and each of them singly, as my true and lawful power of attorney with full power
to (a) apply for access to the EDGAR filing system in my name and (b) sign for
me and file with the Securities and Exchange Commission, the New York Stock
Exchange and the Trust said SEC Forms 3, 4 and/or 5 with respect to my
relationship with the Trust and any shares of the Trust purchased or sold by the
undersigned or any other change of beneficial ownership relating to equity or
derivative securities of the Trust required to be reported by the undersigned.

This authorization shall remain in effect until a written revocation is executed
by the undersigned and filed with the Securities and Exchange Commission.



Signature and Date:                 _____S/Mary Ellen Wesneski_________________

Name:    Mary Ellen Wesneski
Title:   Chief Compliance Officer of MassMutual Corporate Investors
         and MassMutual Participation Investors




















</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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