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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000203077-04-000042.txt : 20040415
<SEC-HEADER>0000203077-04-000042.hdr.sgml : 20040415
<ACCEPTANCE-DATETIME>20040415162411
ACCESSION NUMBER:		0000203077-04-000042
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040414
FILED AS OF DATE:		20040415

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ST JUDE MEDICAL INC
		CENTRAL INDEX KEY:			0000203077
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				411276891
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE LILLEHEI PLAZA
		CITY:			ST PAUL
		STATE:			MN
		ZIP:			55117
		BUSINESS PHONE:		6514832000

	MAIL ADDRESS:	
		STREET 1:		ONE LILLEHEI PLAZA
		CITY:			ST PAUL
		STATE:			MN
		ZIP:			55117

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SHEPHERD TERRY L
		CENTRAL INDEX KEY:			0001233309

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12441
		FILM NUMBER:		04736120

	BUSINESS ADDRESS:	
		STREET 1:		ONE LILLEHEI PLAZA
		CITY:			BRANCHURG
		STATE:			NJ
		ZIP:			08876
		BUSINESS PHONE:		6514832000

	MAIL ADDRESS:	
		STREET 1:		ONE LILLEHEI PLAZA
		CITY:			ST. PAUL
		STATE:			MN
		ZIP:			53717
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-04-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000203077</issuerCik>
        <issuerName>ST JUDE MEDICAL INC</issuerName>
        <issuerTradingSymbol>STJ</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>SHEPHERD TERRY L</rptOwnerName>
        </reportingOwnerId>
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            <rptOwnerStreet1>ONE LILLEHEI PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST. PAUL</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>53717</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO and Chairman</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <transactionTimeliness>
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            <transactionAmounts>
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                <transactionPricePerShare>
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                <sharesOwnedFollowingTransaction>
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            <transactionTimeliness>
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                <sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Right to Sell</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>15.48</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-04-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
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                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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    <ownerSignature>
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        <signatureDate>2004-04-15</signatureDate>
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</ownershipDocument>

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