-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 RBXoCAXphS1tXYjsf5oBdeQcWkdkHlq1jsLC8YZ6ZOAmLp46RG27aCKwsSjOHrbJ
 a3hbxTSgb/CEO+nkg0jkVg==

<SEC-DOCUMENT>0000831655-08-000014.txt : 20080908
<SEC-HEADER>0000831655-08-000014.hdr.sgml : 20080908
<ACCEPTANCE-DATETIME>20080908173643
ACCESSION NUMBER:		0000831655-08-000014
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20080902
FILED AS OF DATE:		20080908
DATE AS OF CHANGE:		20080908

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:		1500 MAIN STREET
		STREET 2:		SUITE 600
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115
		BUSINESS PHONE:		4132261000

	MAIL ADDRESS:	
		STREET 1:		1500 MAIN STREET
		STREET 2:		SUITE 600
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MASSMUTUAL CORPORATE INVESTORS II
		DATE OF NAME CHANGE:	19880417

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DeFrancis Christopher
		CENTRAL INDEX KEY:			0001444695

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05531
		FILM NUMBER:		081061685

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		413-226-1058

	MAIL ADDRESS:	
		STREET 1:		1500 MAIN STREET SUITE 2800
		STREET 2:		BABSON CAPITAL MANAGEMENT LLC
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01115
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>def60.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2008-09-02</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001444695</rptOwnerCik>
            <rptOwnerName>DeFrancis Christopher</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1500 MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2>P O BOX 15189</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>Officer of the Adviser</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: Ann Malloy as Attorney-in-fact for</signatureName>
        <signatureDate>2008-09-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>defrancis2008.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 Security," "Form 4--Statement of Changes in Beneficial Ownership"
and "Form 5 - Annual Statement of Beneficial Ownership of Securities" the
undersigned, being an Officer of Babson Capital Management LLC, an Advisor
to MassMutual Corporate Investors and MassMutual Participation Investors
(each, a "Trust"), hereby appoint and designate Mark Godin, Melissa Busso,
Ruth Howe, Ann Malloy and Melissa LaGrant and each of them singly, 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/or5 with respect to 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:                                     9-3-2008
                 -------------------------------------------------------------
Name:    Christopher DeFrancis
Title:   Assistant Secretary of MassMutual Corporate Investor and MassMutual
         Participation Investors











</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
