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

    <documentType>4</documentType><periodOfReport>2003-10-27</periodOfReport>
    <issuer>
        <issuerCik>0000003327</issuerCik>
        <issuerName>ALBERTO CULVER CO</issuerName>
        <issuerTradingSymbol>ACV  ACVA</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001222216</rptOwnerCik>
            <rptOwnerName>RENZULLI MICHAEL H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4400 WINDSOR RIDGE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>IRVING</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75038</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
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Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>60000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>19.844</value></conversionOrExercisePrice><transactionDate><value>2003-10-27</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>90000</value></transactionShares><transactionPricePerShare><footnoteId id="F10"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F7"/></exerciseDate><expirationDate><value>2009-09-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Class B Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>90000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>24.9375</value></conversionOrExercisePrice><transactionDate><value>2003-10-27</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>67500</value></transactionShares><transactionPricePerShare><footnoteId id="F10"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F8"/></exerciseDate><expirationDate><value>2010-09-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Class B Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>67500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>22500</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>32.655</value></conversionOrExercisePrice><transactionDate><value>2003-10-27</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>45000</value></transactionShares><transactionPricePerShare><footnoteId id="F10"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F9"/></exerciseDate><expirationDate><value>2011-09-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Class B Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>45000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>45000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">The Options vest in four equal annual installments beginning on December 9, 1994.</footnote><footnote id="F2">The Options vest in four equal annual installments beginning on October 31, 1995.</footnote><footnote id="F3">The Options vest in four equal annual installments beginning on October 30, 1996.</footnote><footnote id="F4">The Options vest in four equal annual installments beginning on October 30, 1997.</footnote><footnote id="F5">The Options vest in four equal annual installments beginning on September 30, 1998.</footnote><footnote id="F6">The Options vest in four equal annual installments beginning on September 30, 1999.</footnote><footnote id="F7">The Options vest in four equal annual installments beginning on September 30, 2000.</footnote><footnote id="F8">The Options vest in four equal annual installments beginning on September 30, 2001.</footnote><footnote id="F9">The Options vest in four equal annual installments beginning on September 30, 2002.</footnote><footnote id="F10">On October 22, 2003, the Board of Directors of Alberto-Culver Company (the &quot;Company&quot;) approved the conversion of all of the issued shares of Class A Common Stock on a one-share-for-one-share basis into Class B Common Stock in accordance with the terms of the Company's Certificate of Incorporation (the &quot;Conversion&quot;).  The Conversion will become effective November 5, 2003.  The options reported on this form were originally granted as options to purchase Class A Common Stock.  Because the only condition remaining to complete the Conversion is the passage of time, all of the reported exercises have been reported as Class B Common Stock.</footnote></footnotes><remarks/><ownerSignature><signatureName>/James M. Spira/Attorney-in-fact for Michael H. Renzulli</signatureName><signatureDate>2003-10-28</signatureDate></ownerSignature></ownershipDocument>

