<?xml version="1.0"?><ownershipDocument><schemaVersion>X0101</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-06-02</periodOfReport><issuer><issuerCik>0000276400</issuerCik><issuerName>BANCINSURANCE CORP</issuerName>        <issuerTradingSymbol>BCIS</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001183450</rptOwnerCik><rptOwnerName>STEPHAN DANIEL J</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>  </rptOwnerStreet1><rptOwnerStreet2>  </rptOwnerStreet2><rptOwnerCity>  </rptOwnerCity><rptOwnerState>  </rptOwnerState><rptOwnerZipCode>  </rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>SVP Marketing (of Subsidiary)</officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Option to purchase Common Shares</value></securityTitle><conversionOrExercisePrice><value>5.21</value></conversionOrExercisePrice><transactionDate><value>2003-06-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>5000</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-06-02</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2013-06-01</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares</value></underlyingSecurityTitle><underlyingSecurityShares><value>5000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">20% of the grant becomes exercisable on each of the first five anniversaries of the date of grant.</footnote></footnotes><ownerSignature><signatureName>/s/ Daniel J. Stephan</signatureName><signatureDate>2003-06-04</signatureDate></ownerSignature></ownershipDocument>

