<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-05</periodOfReport>
    <issuer>
        <issuerCik>0000310569</issuerCik>
        <issuerName>ANHEUSER BUSCH COMPANIES INC</issuerName>
        <issuerTradingSymbol>BUD</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001183424</rptOwnerCik>
            <rptOwnerName>GONZALEZ CARLOS FERNANDEZ</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>GRUPO MODELO, S.A. DE C.V.</rptOwnerStreet1>
            <rptOwnerStreet2>CAMPOS ELISEOS NO. 400 PISO 18</rptOwnerStreet2>
            <rptOwnerCity>LOMAS DE CHAPULTEPEC</rptOwnerCity>
            <rptOwnerState>O5</rptOwnerState>
            <rptOwnerZipCode>11000</rptOwnerZipCode>
            <rptOwnerStateDescription>MEXICO</rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock ($1 par value)</value></securityTitle><transactionDate><value>2004-01-05</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1"/></transactionCoding><transactionAmounts><transactionShares><value>731</value></transactionShares><transactionPricePerShare><value>52.655</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>11980</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value><footnoteId id="F2"/></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Shares acquired in lieu of cash for 2004 annual retainer fee pursuant to the Anheuser-Busch Companies, Inc. Non-Employee Director Elective Stock Acquisition Plan.</footnote><footnote id="F2">In connection with the Rights Agreement adopted by the Company, Preferred Stock Purchase Rights were distributed to shareholders and are deemed to be attached to the shares of Common Stock of the Company listed on this Form.  One-quarter of a Preferred Stock Purchase Right is attached to each share of common stock.  If and when the Rights become exercisable, the holder of each Right initially would be entitled to purchase one one-hundredth of a share of Series Junior B Participating Preferred Stock at a purchase price of $195 (both the number of fractional shares and the purchase price are subject to adjustment).</footnote></footnotes><remarks/><ownerSignature><signatureName>Laura H. Reeves, Attorney-in-Fact for Carlos Fernandez Gonzalez</signatureName><signatureDate>2004-01-07</signatureDate></ownerSignature></ownershipDocument>

