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

    <documentType>4</documentType>
<periodOfReport>2003-12-15</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000020629</issuerCik>
        <issuerName>CSS INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>&quot;CSS&quot;</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001253209</rptOwnerCik>
            <rptOwnerName>KURTZMAN ELLEN B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CSS INDUSTRIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1845 WALNUT STREET  SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>PHILADELPHIA</rptOwnerCity>
            <rptOwnerState>X1</rptOwnerState>
            <rptOwnerZipCode>19103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>0</isOfficer>
<isTenPercentOwner>1</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle></officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2003-12-15</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>5</transactionFormType>
<transactionCode>G</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
<footnoteId id="F2"/>
</transactionCoding>
<transactionTimeliness>
<value>E</value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>965151</value>
<footnoteId id="F1"/>
<footnoteId id="F2"/>
</transactionShares>
<transactionPricePerShare>
<value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
<footnoteId id="F2"/>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>965151</value>
<footnoteId id="F1"/>
<footnoteId id="F2"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By the 2003 Jack Farber Trust</value>
<footnoteId id="F2"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2003-12-15</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>5</transactionFormType>
<transactionCode>G</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
<footnoteId id="F3"/>
</transactionCoding>
<transactionTimeliness>
<value>E</value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>351042</value>
<footnoteId id="F1"/>
<footnoteId id="F3"/>
</transactionShares>
<transactionPricePerShare>
<value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
<footnoteId id="F3"/>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>351042</value>
<footnoteId id="F1"/>
<footnoteId id="F3"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By The 2003 Vivian Farber Trust</value>
<footnoteId id="F3"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2003-12-15</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>5</transactionFormType>
<transactionCode>G</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
<footnoteId id="F4"/>
</transactionCoding>
<transactionTimeliness>
<value>E</value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>45722</value>
<footnoteId id="F1"/>
<footnoteId id="F4"/>
</transactionShares>
<transactionPricePerShare>
<value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
<footnoteId id="F4"/>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>179278</value>
<footnoteId id="F1"/>
<footnoteId id="F4"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By Farber Family Charitable Lead Annuity Trust</value>
<footnoteId id="F4"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>750</value>
<footnoteId id="F1"/>
<footnoteId id="F5"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By Delv L.P.</value>
<footnoteId id="F5"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>40800</value>
<footnoteId id="F1"/>
<footnoteId id="F6"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By trust FBO Robert Kurtzman</value>
<footnoteId id="F6"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>42675</value>
<footnoteId id="F1"/>
<footnoteId id="F7"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By Trust FBO Leigh Ann Kurtzman</value>
<footnoteId id="F7"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>111021</value>
<footnoteId id="F1"/>
<footnoteId id="F8"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By Trust FBO William Farber</value>
<footnoteId id="F8"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>107271</value>
<footnoteId id="F1"/>
<footnoteId id="F9"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By Trust FBO Kenneth Kurtzman</value>
<footnoteId id="F9"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>749250</value>
<footnoteId id="F1"/>
<footnoteId id="F10"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value>By 2003 Farber Family Trust</value>
<footnoteId id="F1"/>
<footnoteId id="F10"/>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>331587</value>
<footnoteId id="F1"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
</nonDerivativeTable>
<footnotes>
<footnote id="F1">Reflects three for two stock split paid July 10, 2003.</footnote>
<footnote id="F2">Represents shares contributed by Jack Farber to The Jack Farber 2003 Irrevocable Indenture of Trust dated December 15, 2003 (the &quot;2003 Jack Farber Trust&quot;).  The reporting person is the sole trustee of the 2003 Jack Farber Trust, and the beneficiary of this trust is the reporting person&#039;s father, Jack Farber.  The reporting person disclaims ownership of these shares to the extent that she does not have a pecuniary interest in them.</footnote>
<footnote id="F3">Represents shares contributed by Vivian Farber to The Vivian Farber 2003 Irrevocable Indenture of Trust (the &quot;2003 Vivian Farber Trust&quot;).  The reporting person is the sole trustee of the 2003 Vivian Farber Trust and the beneficiary of this trust is the reporting person&#039;s mother, Vivian Farber.  The reporting person disclaims beneficial ownership of these shares to the extent that she does not have a pecuniary interest in them.</footnote>
<footnote id="F4">Represents shares donated by the Farber Family Charitable Lead Annuity Trust to The Farber Family Foundation, Inc.  The reporting person is the trustee of the Farber Family Charitable Lead Annuity Trust.  The Trust FBO Ellen B. Kurtzman under the 2002 Farber Children&#039;s Trusts dated December 12, 2002 (the &quot;EBK Trust&quot;) and the Trust FBO David M. Farber under the 2002 Farber Children&#039;s Trusts dated December 12, 2002 (the &quot;DMF Trust&quot;) each hold a remainder interest in the Farber Family Charitable Lead Annunity Trust.  The reporting person is the trustee of the EBK and the DMF trusts.  The reporting person disclaims beneficial ownership of these 179,278 shares to the extent that she does not have a pecuniary interest in them.</footnote>
<footnote id="F5">Represents 0.1% of the shares owned directly by Delv, L.P. and deemed owned indirectly by the reporting person.  Of these 750 shares, 375 shares may be deemed to be owned indirectly by each of the Trust FBO Ellen B. Kurtzman under the 2002 Farber Children&#039;s Trusts dated December 12, 2002 (the &quot;EBK Trust&quot;) and the Trust FBO David M. Farber under 2002 Farber Children&#039;s Trusts dated December 12, 2002 (the &quot;DMF Trust&quot;), by virtue of their equal ownership of all of the common stock of the General Partner of Delv, L.P., which indirectly owns 750 shares through Delv, L.P.  The reporting person may be deemed to indirectly own 750 shares of the Issuer&#039;s common stock by virtue of her position as the sole trustee of the EBK Trust and the DMF Trust.  The reporting person disclaims beneficial ownership of these shares to the extent that she does not have a pecuniary interest in them.</footnote>
<footnote id="F6">The reporting person, as co-trustee, indirectly holds 40,800 shares of the Issuer&#039;s common stock held by the trust FBO Robert Kurtzman.  The reporting person disclaims beneficial ownership of these shares to the extent she does not have a pecuniary interest in them.</footnote>
<footnote id="F7">The reporting person, as co-trustee, indirectly holds 42,675 shares of the Issuer&#039;s common stock held by the trust FBO Leigh Ann Kurtzman.  The reporting person disclaims beneficial ownership of these shares to the extent she does not have a pecuniary interest in them.</footnote>
<footnote id="F8">The reporting person, as co-trustee, indirectly holds 111,021 shares of the Issuer&#039;s common stock held by the trust FBO William Farber.  The reporting person disclaims beneficial ownership of these shares.</footnote>
<footnote id="F9">The reporting person, as co-trustee, indirectly holds 107,271 shares of the Issuer&#039;s common stock held by the trust FBO Kenneth Kurtzman.  The reporting person disclaims beneficial ownership of these shares to the extent she does not have a pecuniary interest in them.</footnote>
<footnote id="F10">Represents 99.9% of the shares owned directly Delv, L.P.  The 2003 Farber Family Trust (the &quot;2003 Trust&quot;) owns a 99.9% limited partnership interest in Delv, L.P.  The reporting person is the sole trustee of the 2003 Trust, and the beneficiaries of this trust are such members of the reporting person&#039;s family as may be designated by the trustee.  The reporting person disclaims beneficial ownership of these shares to the extent she does not have a precuniary interest in them.</footnote>
</footnotes>
<remarks></remarks>
<ownerSignature>
<signatureName>Ellen B. Kurtzman</signatureName>
<signatureDate>2003-12-17</signatureDate>
</ownerSignature>
</ownershipDocument>

