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

    <documentType>4</documentType><periodOfReport>2002-12-24</periodOfReport>
    <issuer>
        <issuerCik>0001009242</issuerCik>
        <issuerName>HOME FINANCIAL BANCORP</issuerName>
        <issuerTradingSymbol>HWEN</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001202302</rptOwnerCik>
            <rptOwnerName>ROSENBERGER KURT D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12162 N. MANN ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MOORESVILLE,</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>46158</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>President, CEO</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock, without par value</value></securityTitle><transactionDate><value>2002-12-24</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1"/></transactionCoding><transactionAmounts><transactionShares><value>1475</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>12458</value><footnoteId id="F2"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">These shares were acquired by the Reporting Person pursuant to the Owen Community Bank s.b. Recognition and Retention Plan which meets the requirements of 17 CFR ?? 240.16b.3.</footnote><footnote id="F2">The Reporting Person also beneficially owns 14,942 shares held in the Home Financial Bancorp Employee Stock Ownership Plan.</footnote></footnotes><remarks/><ownerSignature><signatureName>Kurt D. Rosenberger</signatureName><signatureDate>2003-08-18</signatureDate></ownerSignature></ownershipDocument>

