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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001209191-08-016525.txt : 20080306
<SEC-HEADER>0001209191-08-016525.hdr.sgml : 20080306
<ACCEPTANCE-DATETIME>20080306172010
ACCESSION NUMBER:		0001209191-08-016525
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080304
FILED AS OF DATE:		20080306
DATE AS OF CHANGE:		20080306

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Maniscalco Charles
		CENTRAL INDEX KEY:			0001375659

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-01183
		FILM NUMBER:		08671934

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		914-253-2000

	MAIL ADDRESS:	
		STREET 1:		PEPSICO, INC.
		STREET 2:		700 ANDERSON HILL ROAD
		CITY:			PURCHASE
		STATE:			NY
		ZIP:			10577

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PEPSICO INC
		CENTRAL INDEX KEY:			0000077476
		STANDARD INDUSTRIAL CLASSIFICATION:	BEVERAGES [2080]
		IRS NUMBER:				131584302
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1229

	BUSINESS ADDRESS:	
		STREET 1:		700 ANDERSON HILL RD
		CITY:			PURCHASE
		STATE:			NY
		ZIP:			10577
		BUSINESS PHONE:		9142532000

	MAIL ADDRESS:	
		STREET 1:		700 ANDERSON HILL ROAD
		CITY:			PURCHASE
		STATE:			NY
		ZIP:			10577-1444

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PEPSI COLA CO
		DATE OF NAME CHANGE:	19700903
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-03-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000077476</issuerCik>
        <issuerName>PEPSICO INC</issuerName>
        <issuerTradingSymbol>PEP</issuerTradingSymbol>
    </issuer>

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        <reportingOwnerId>
            <rptOwnerCik>0001375659</rptOwnerCik>
            <rptOwnerName>Maniscalco Charles</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PEPSICO, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>700 ANDERSON HILL ROAD</rptOwnerStreet2>
            <rptOwnerCity>PURCHASE</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10577</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President of PepsiCo Chicago</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
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                <transactionPricePerShare>
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                    <value>128562</value>
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                <sharesOwnedFollowingTransaction>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
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                <transactionShares>
                    <value>1015</value>
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                <transactionPricePerShare>
                    <value>70.12</value>
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                <transactionAcquiredDisposedCode>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        <nonDerivativeTransaction>
            <securityTitle>
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            <transactionDate>
                <value>2008-03-04</value>
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                <transactionFormType>4</transactionFormType>
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            <transactionAmounts>
                <transactionShares>
                    <value>314</value>
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                <transactionPricePerShare>
                    <value>70.16</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>99048</value>
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                <transactionPricePerShare>
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            <transactionTimeliness>
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            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>64562</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>PepsiCo, Inc. Common Stock</value>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by 401(k)</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
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            <transactionDate>
                <value>2008-03-04</value>
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            <transactionCoding>
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            </transactionCoding>
            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
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                <transactionPricePerShare>
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            <exerciseDate>
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                <value>2012-01-31</value>
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                <underlyingSecurityTitle>
                    <value>PepsiCo, Inc. Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>64000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeHolding>
            <securityTitle>
                <value>PepsiCo, Inc. Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
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            <expirationDate>
                <footnoteId id="F2"/>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>PepsiCo, Inc. Common Stock</value>
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                <underlyingSecurityShares>
                    <value>0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4696.83</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by 401(k)</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Reflects number of shares held under the reporting person's account in the PepsiCo 401(k) Plan as of 03/04/2008.</footnote>
        <footnote id="F2">PepsiCo convertible preferred stock was issued solely in connection with an employee stock ownership plan (ESOP) established by The Quaker Oats Company and these preferred shares are redeemable for common stock by the former ESOP participants. Each share of preferred stock is convertible at any time at the option of the holder into 4.9625 shares of PepsiCo common stock and has no expiration date. All shares of preferred stock are held under the reporting person's account in the PepsiCo 401(k) Plan as of March 4, 2008.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Thomas H. Tamoney, Jr., Atty-in-Fact</signatureName>
        <signatureDate>2008-03-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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