<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-01-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000009235</issuerCik>
        <issuerName>BKF CAPITAL GROUP INC</issuerName>
        <issuerTradingSymbol>BKF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001287649</rptOwnerCik>
            <rptOwnerName>CANNELL J CARLO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>150 CALIFORNIA STREET 5TH FL</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-01-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.552</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>639500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through one or more funds</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <remarks>This is a filing by J. Carlo Cannell (&quot;Cannell&quot;).  Mr. Cannell has sole voting and investment control over all securities owned by The Cuttyhunk Fund Limited (&quot;Cuttyhunk&quot;), the Anegada Master Fund, Ltd. (&quot;Anegada&quot;), TE Cannell Portfolio, Ltd. (&quot;TEC&quot;) and Tonga Partners, L.P. (&quot;Tonga&quot; and, collectively, with Cuttyhunk, Anegada and TEC, the &quot;Funds&quot;).  Cuttyhunk owns 204,300 shares, Anegada owns 247,200 shares, TEC owns 155,700 shares, and Tonga owns 392,300 shares.  Mr. Cannell's interest in the shares held by the Funds is limited to the extent of his pecuniary interest therein.</remarks>

    <ownerSignature>
        <signatureName>J. Carlo Cannell</signatureName>
        <signatureDate>2006-01-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
