-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 QEoeS7FzwKH7nhSLQ556vEW4tEf9JSCFrQmHNTJyVztm+vUpY9M9qpnTI/5OP7eo
 PzD/SW0wE1YMEwhvqUAJ1Q==

<SEC-DOCUMENT>0001209191-04-059939.txt : 20041230
<SEC-HEADER>0001209191-04-059939.hdr.sgml : 20041230
<ACCEPTANCE-DATETIME>20041230174303
ACCESSION NUMBER:		0001209191-04-059939
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031001
FILED AS OF DATE:		20041230
DATE AS OF CHANGE:		20041230

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ACHARYA ABHI
		CENTRAL INDEX KEY:			0001233597

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20805
		FILM NUMBER:		041235057

	MAIL ADDRESS:	
		STREET 1:		13733 LEXINGTON COURT
		CITY:			SARATOGA
		STATE:			CA
		ZIP:			95070

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			REGEN BIOLOGICS INC
		CENTRAL INDEX KEY:			0000883697
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				232476415
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		509 COMMERCE STREET
		STREET 2:		EAST WING
		CITY:			FRANKLIN LAKES
		STATE:			NJ
		ZIP:			07417
		BUSINESS PHONE:		2016515140

	MAIL ADDRESS:	
		STREET 1:		509 COMMERCE STREET
		STREET 2:		EAST WING
		CITY:			FRANKLIN LAKES
		STATE:			NJ
		ZIP:			07417

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AROS CORP
		DATE OF NAME CHANGE:	20010712

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	APACHE MEDICAL SYSTEMS INC
		DATE OF NAME CHANGE:	19960426
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-10-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000883697</issuerCik>
        <issuerName>REGEN BIOLOGICS INC</issuerName>
        <issuerTradingSymbol>RGBI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001233597</rptOwnerCik>
            <rptOwnerName>ACHARYA ABHI</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>509 COMMERCE STREET</rptOwnerStreet1>
            <rptOwnerStreet2>1ST FLOOR, EAST WING</rptOwnerStreet2>
            <rptOwnerCity>FRANKLIN LAKES</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07417</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.45</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2003-10-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>200000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-10-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>200000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>200000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Options vest pro rata over a four year period beginning on the date of grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Brion Umidi, Attorney-in-Fact</signatureName>
        <signatureDate>2004-12-29</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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