-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 Ag8frViBTfQiIX6wShGTfhE+LgwOI/VWFqyCPrSBnnkTdIlmVIwfuwfclVDeW7sS
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<SEC-DOCUMENT>0000009015-08-000046.txt : 20080919
<SEC-HEADER>0000009015-08-000046.hdr.sgml : 20080919
<ACCEPTANCE-DATETIME>20080919161442
ACCESSION NUMBER:		0000009015-08-000046
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080918
FILED AS OF DATE:		20080919
DATE AS OF CHANGE:		20080919

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MASSACHUSETTS MUTUAL LIFE INSURANCE CO
		CENTRAL INDEX KEY:			0000225602
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-02183
		FILM NUMBER:		081080637

	BUSINESS ADDRESS:	
		STREET 1:		1295 STATE ST B050
		CITY:			SPRINGFIELD
		STATE:			MA
		ZIP:			01111
		BUSINESS PHONE:		4137448411

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASSMUTUAL CORPORATE INVESTORS
		CENTRAL INDEX KEY:			0000275694
		IRS NUMBER:				042483041
		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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BABSON CAPITAL MANAGEMENT LLC
		CENTRAL INDEX KEY:			0000009015
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-02183
		FILM NUMBER:		081080636

	BUSINESS ADDRESS:	
		STREET 1:		470 ATLANTIC AVENUE
		STREET 2:		10TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
		BUSINESS PHONE:		617-761-6662

	MAIL ADDRESS:	
		STREET 1:		470 ATLANTIC AVENUE
		STREET 2:		10TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210

	FORMER NAME:	
		FORMER CONFORMED NAME:	BABSON DAVID L & CO INC
		DATE OF NAME CHANGE:	19920929
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>mas424.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-09-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000275694</issuerCik>
        <issuerName>MASSMUTUAL CORPORATE INVESTORS</issuerName>
        <issuerTradingSymbol>MCI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000225602</rptOwnerCik>
            <rptOwnerName>MASSACHUSETTS MUTUAL LIFE INSURANCE CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1295 STATE STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SPRINGFIELD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Footer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000009015</rptOwnerCik>
            <rptOwnerName>BABSON CAPITAL MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1500 MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SPRINGFIELD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01115</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Investment Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Senior Fixed Rate Convertible Note Due 11/15/2017</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Shares of Beneficial Interest (&quot;Common Shares&quot;)</value>
            </securityTitle>
            <transactionDate>
                <value>2008-09-18</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1333</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>24.73</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1333.00</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Babson Capital Management LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Shares of Beneficial Interest (&quot;Common Shares&quot;)</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>27009.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Cornerstone Real Estate Advisers LLC</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F2">The inclusion of the Babson Capital held securities of the Issuer shall not be construed as an admission that MassMutual or Cornerstone Real Estate Advisers LLC (&quot;Cornerstone&quot;) is for the purpose of Section 16 of the Securities Exchange Act of 1934, the direct or indirect beneficial owner of any of the securities of the Issuer beneficially owned by Babson Capital.</footnote>
        <footnote id="F3">Purchased pursuant to Rule 10b5-1 Plan for Babson Capital, the investment adviser to Issuer and wholly-owned indirect subsidiary of MassMutual.</footnote>
        <footnote id="F4">Cornerstone is a wholly-owned indirect subsidiary of MassMutual.</footnote>
    </footnotes>

    <remarks>This a joint filing made on behalf of Massachusetts Mutual Life Insurance Company (&quot;MassMutual&quot;) and Babson Capital Management LLC (&quot;Babson Capital&quot;).</remarks>

    <ownerSignature>
        <signatureName>/s/ Massachusetts Mutual Life Insurance Co,</signatureName>
        <signatureDate>2008-09-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Babson Capital Management LLC,</signatureName>
        <signatureDate>2008-09-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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