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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 N3Jbv/XwNK4NZEkR/Xu1+Ny08RXy24+87hAA9uvjtekCc69v5KKV8ZV5IdUVIj6V
 udd053yCR6eHRFCBqz9NRQ==

<SEC-DOCUMENT>0000874691-06-000147.txt : 20061024
<SEC-HEADER>0000874691-06-000147.hdr.sgml : 20061024
<ACCEPTANCE-DATETIME>20061024162228
ACCESSION NUMBER:		0000874691-06-000147
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061024
FILED AS OF DATE:		20061024
DATE AS OF CHANGE:		20061024

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OSI RESTAURANT PARTNERS, INC.
		CENTRAL INDEX KEY:			0000874691
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-EATING PLACES [5812]
		IRS NUMBER:				593061413
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2202 NORTH WEST SHORE BLVD.
		STREET 2:		SUITE 500
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33607
		BUSINESS PHONE:		813-282-1225

	MAIL ADDRESS:	
		STREET 1:		2202 NORTH WEST SHORE BLVD.
		STREET 2:		SUITE 500
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33607

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OUTBACK STEAKHOUSE INC
		DATE OF NAME CHANGE:	19921217

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KADOW JOSEPH JOHN
		CENTRAL INDEX KEY:			0001019438
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-EATING PLACES [5812]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15935
		FILM NUMBER:		061160488

	BUSINESS ADDRESS:	
		STREET 1:		2202 NORTH WEST SHORE BLVD., 5TH FLOOR
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33607
		BUSINESS PHONE:		8132821225

	MAIL ADDRESS:	
		STREET 1:		2202 NORTH WEST SHORE BLVD
		STREET 2:		5TH FLOOR
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33607
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-10-24</periodOfReport>

    <issuer>
        <issuerCik>0000874691</issuerCik>
        <issuerName>OSI RESTAURANT PARTNERS, INC.</issuerName>
        <issuerTradingSymbol>OSI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001019438</rptOwnerCik>
            <rptOwnerName>KADOW JOSEPH JOHN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OSI RESTAURANT PARTNERS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2202 N. WEST SHORE BLVD., 5TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>TAMPA</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33607</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive VP &amp; Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $.01</value>
            </securityTitle>
            <transactionDate>
                <value>2006-10-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $.01</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50000</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>24.875</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2009-01-27</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>100000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>28.39</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <value>2012-07-24</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>39.57</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-10-27</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>75000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The reporting person received 25,000 shares of restricted stock that vest in three annual installments beginning on 10/26/2009, in the respective amounts of 5,000 shares, 5,000 shares and 15,000 shares.</footnote>
        <footnote id="F2">The reporting person received 50,000 shares of restricted stock that vest in three annual installments beginning on 10/26/2008, in the respective amounts of 10,000 shares, 10,000 shares and 30,000 shares.</footnote>
        <footnote id="F3">Currently exercisable. The option vests in three annual installments beginning on 01/27/2002, in the respective amounts of 30,000 shares, 30,000 shares and 90,000 shares.</footnote>
        <footnote id="F4">The option vests in three annual installments beginning on 07/01/2005, in the respective amounts of 10,000 shares, 10,000 shares and 30,000 shares.</footnote>
        <footnote id="F5">The option vests in three annual installments beginning on 10/27/2007, in the respective amounts of 15,000 shares, 15,000 shares and 45,000 shares.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Joseph J. Kadow</signatureName>
        <signatureDate>2006-10-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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