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

    <documentType>3</documentType>
<periodOfReport>2003-12-15</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000020629</issuerCik>
        <issuerName>CSS INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>CSS</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001273880</rptOwnerCik>
            <rptOwnerName>FARBER JACK 2003 IRREVOCABLE TRUST DATED DECEMBER 15 2003</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CSS INDUSTRIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1845 WALNUT STREET, SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>PHILADELPHIA</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>0</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>1</isOther>
<officerTitle></officerTitle>
<otherText>See Footnote 1</otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable>
<nonDerivativeHolding>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>965151</value>
<footnoteId id="F1"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
</nonDerivativeTable>
<footnotes>
<footnote id="F1">The reporting person is a member of a Section 13(d) group that owns more than 10% of the Issuer&#039;s outstanding common stock.  All shares listed on this Form 3 are deemed owned indirectly by Ellen B. Kurtzman, in her capacity as trustee of The Jack Farber 2003 Irrovecable Indenture of Trust dated December 15, 2003.</footnote>
</footnotes>
<remarks></remarks>
<ownerSignature>
<signatureName>Ellen B. Kurtzman as Trustee of The Jack Farber 2003 Irrevocable Indenture of Trust dated December 15, 2003</signatureName>
<signatureDate>2003-12-22</signatureDate>
</ownerSignature>
</ownershipDocument>

