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

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-07-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <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>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>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>0</isOther>
        </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>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001457848</rptOwnerCik>
            <rptOwnerName>AMERICAN HALLMARK INSURANCE Co OF TEXAS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>777 MAIN STREET, SUITE 1000</rptOwnerStreet1>
            <rptOwnerStreet2></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>2010-07-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>17048</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2169642</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>see footnotes</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-07-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>17048</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2169642</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>see footnotes</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Constitutes a distribution of shares to Schwarz in satisfaction of a partial redemption from NP as of June 30, 2010.</footnote>
        <footnote id="F2">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;), Newcastle Focus Fund II, L.P. (&quot;NFF&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="F3">NCM is the general partner of each of NP and NFF. 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 and NFF. 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="F4">Constitutes a contribution of shares by Schwarz to NFF.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Mark E. Schwarz</signatureName>
        <signatureDate>2010-07-13</signatureDate>
    </ownerSignature>

    <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>2010-07-13</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>2010-07-13</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Newcastle Capital Group, L.L.C. its general partner, By: /s/ Mark E. Schwarz, its managing member</signatureName>
        <signatureDate>2010-07-13</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Clinton J. Coleman</signatureName>
        <signatureDate>2010-07-13</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Hallmark Financial Services, Inc.</signatureName>
        <signatureDate>2010-07-13</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Hallmark Insurance Co. of Texas</signatureName>
        <signatureDate>2010-07-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
