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

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2010-01-05</periodOfReport>

    <dateOfOriginalSubmission>2010-01-07</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000718332</issuerCik>
        <issuerName>PIZZA INN INC /MO/</issuerName>
        <issuerTradingSymbol>PZZI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000932334</rptOwnerCik>
            <rptOwnerName>NEWCASTLE PARTNERS L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CRESCENT COURT</rptOwnerStreet1>
            <rptOwnerStreet2>STE 1400</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>see attached explanation</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001251296</rptOwnerCik>
            <rptOwnerName>NEWCASTLE CAPITAL MANAGEMENT LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CRESCENT COURT</rptOwnerStreet1>
            <rptOwnerStreet2>STE 1400</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>see attached explanation</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001251293</rptOwnerCik>
            <rptOwnerName>NEWCASTLE CAPITAL GROUP LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CRESCENT COURT</rptOwnerStreet1>
            <rptOwnerStreet2>STE 1400</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>see attached explanation</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001208889</rptOwnerCik>
            <rptOwnerName>SCHWARZ MARK E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CRESCENT COURT</rptOwnerStreet1>
            <rptOwnerStreet2>STE 1400</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle>Chairman</officerTitle>
            <otherText>see attached explanation</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001347250</rptOwnerCik>
            <rptOwnerName>Coleman Clinton J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NEWCASTLE CAPITAL MANAGEMENT, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>200 CRESCENT COURT, SUITE 1400</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>see attached explanation</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000819913</rptOwnerCik>
            <rptOwnerName>HALLMARK FINANCIAL SERVICES INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>777 MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2>STE 1000</rptOwnerStreet2>
            <rptOwnerCity>FORT WORTH</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>76102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>see attached explanation</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-01-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>87582</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2230067</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Persons are members of a &quot;group&quot; for purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended and accordingly may be deemed to beneficially own Shares of the Issuer's Common Stock owned in the aggregate by the other members of the Section 13(d) group. The Section 13(d) group consists of Newcastle Partners, L.P. (&quot;NP&quot;), Newcastle Capital Management, L.P. (&quot;NCM&quot;), Newcastle Capital Group, L.L.C. (&quot;NCG&quot;), Hallmark Financial Services, Inc. (&quot;Hallmark&quot;), American Hallmark Insurance Company of Texas (&quot;AHIC&quot;), Mark E. Schwarz (&quot;Schwarz&quot;) and Clinton J. Coleman (&quot;Coleman&quot;). Each Reporting Person disclaims beneficial ownership of the shares of the Issuer's Common Stock owned by the other members of the Section 13(d) group except to the extent of its pecuniary interest therein.</footnote>
        <footnote id="F2">NCM is the general partner of each of NP. NCG is the general partner of NCM, and Schwarz is the managing member of NCG. Accordingly, each of NCM, NCG and Schwarz may be deemed to beneficially own the shares directly owned by NP. In addition, NCM may be deemed to beneficially own a controlling interest in Hallmark, and Hallmark is the parent company of AHIC. Accordingly, each of NCM, NCG, Schwarz and Hallmark may be deemed to beneficially own the shares directly owned by AHIC.</footnote>
        <footnote id="F3">Constitutes a distribution of shares to withdrawing partners of NP as of December 31, 2009.</footnote>
        <footnote id="F4">Form 4-A amends Form 4 filed on January 7, 2010 to correct footnotes.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Newcastle Partners, L.P., By: Newcastle Capital Management, L.P., its general partner, By: Newcastle Capital Group, L.L.C. its general partner, By: /s/ Mark E. Schwarz, its managing member</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Newcastle Capital Management, L.P., its general partner, By: Newcastle Capital Group, L.L.C. its general partner, By: /s/ Mark E. Schwarz, its managing member</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Newcastle Capital Group, L.L.C. its general partner, By: /s/ Mark E. Schwarz, its managing member</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Mark E. Schwarz</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Clinton J. Coleman</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Hallmark Financial Services, Inc.</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Hallmark Insurance Co. of Texas</signatureName>
        <signatureDate>2010-02-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
