-----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,
 SyesoTJ5IOgvYZmS49OZKjg15Mch4yAh/Rfb4kOIbSoWAdmTnHdKYRKYnpreGSJ4
 Jls2GVPx4Pu4yS1yMdkxNA==

<SEC-DOCUMENT>0001181431-04-022839.txt : 20040429
<SEC-HEADER>0001181431-04-022839.hdr.sgml : 20040429
<ACCEPTANCE-DATETIME>20040429110508
ACCESSION NUMBER:		0001181431-04-022839
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040428
FILED AS OF DATE:		20040429

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HENDRICKS MAUREEN A
		CENTRAL INDEX KEY:			0001193259

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09781
		FILM NUMBER:		04763032

	MAIL ADDRESS:	
		STREET 1:		C/O MILLIPORE CORP
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MILLIPORE CORP /MA
		CENTRAL INDEX KEY:			0000066479
		STANDARD INDUSTRIAL CLASSIFICATION:	LABORATORY ANALYTICAL INSTRUMENTS [3826]
		IRS NUMBER:				042170233
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		80 ASHBY RD
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730
		BUSINESS PHONE:		7815336000

	MAIL ADDRESS:	
		STREET 1:		80 ASHBY ROAD
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MILLIPORE CORP
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MILLIPORE FILTER CORP
		DATE OF NAME CHANGE:	19661116
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd40381.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-04-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000066479</issuerCik>
        <issuerName>MILLIPORE CORP /MA</issuerName>
        <issuerTradingSymbol>MIL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001193259</rptOwnerCik>
            <rptOwnerName>HENDRICKS MAUREEN A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>290 CONCORD ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BILLERICA</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01821</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $1.00 Par Value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (rights to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>54.76</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-04-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-04-28</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-04-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, 1.00 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The reporting person also holds options to purchase shares of Millipore Common Stock under the 1999 Stock Option Plan for Non-Employee Directors as follows: 4524 shares at 33.16 per share granted 09/14/1995 expiration 09/14/2005; 2262 shares at 35.92 per share granted 04/18/1996 expir. 04/18/2006; 2262 shares at 35.04 per share granted 04/17/1997 expiration 04/17/2007; 2262 shares at 31.50 per share granted 04/16/1998 expir. 04/16/2008; 2262 shares at 26.47 per share granted 04/22/1999 expiration 04/22/2009; 2262 shares at 61.84 per share granted 04/27/2000 expir. 04/27/2010; 2262 shares at 49.78 per share granted 04/25/2001 expir. 04/25/2011; 2000 shares at 41.41 per share granted 04/25/2002 expir. 04/25/2012; 2500 shares at 33.69 per share granted 04/30/2003 expir. 04/30/2013.  The reporting person also acquired, prior to June 2002, 6376.46 deferred compensation phantom stock units.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>patricia a. powers, attorney in fact</signatureName>
        <signatureDate>2004-04-29</signatureDate>
    </ownerSignature>
</ownershipDocument>

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