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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001209191-08-023628.txt : 20080410
<SEC-HEADER>0001209191-08-023628.hdr.sgml : 20080410
<ACCEPTANCE-DATETIME>20080410150022
ACCESSION NUMBER:		0001209191-08-023628
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080408
FILED AS OF DATE:		20080410
DATE AS OF CHANGE:		20080410

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BIOGEN IDEC INC.
		CENTRAL INDEX KEY:			0000875045
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				330112644
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		14 CAMBRIDGE CENTER
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		6176792000

	MAIL ADDRESS:	
		STREET 1:		14 CAMBRIDGE CENTER
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BIOGEN IDEC INC
		DATE OF NAME CHANGE:	20031112

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IDEC PHARMACEUTICALS CORP / DE
		DATE OF NAME CHANGE:	19970530

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SHARP PHILIP A
		CENTRAL INDEX KEY:			0001226295
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19311
		FILM NUMBER:		08749832

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		6176792000

	MAIL ADDRESS:	
		STREET 1:		BIOGEN INC LEGAL DEPARTMENT
		STREET 2:		14 CAMBRIDGE CENTER
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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            <securityTitle>
                <value>Stock Option (right to buy)</value>
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                <value>35.42</value>
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            <transactionDate>
                <value>2008-04-08</value>
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            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
                <value></value>
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                <transactionShares>
                    <value>50000</value>
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                <transactionPricePerShare>
                    <value>0.00</value>
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            <exerciseDate>
                <footnoteId id="F2"/>
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            <expirationDate>
                <value>2008-12-11</value>
            </expirationDate>
            <underlyingSecurity>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>122500</value>
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            <ownershipNature>
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                    <value>D</value>
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        <derivativeTransaction>
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                <value>Stock Option (right to buy)</value>
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                <transactionCode>M</transactionCode>
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                    <footnoteId id="F3"/>
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                <transactionAcquiredDisposedCode>
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            <underlyingSecurity>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Exercise/sale pursuant to a trading plan intended to comply with Rule 10b5-1 of the Securities Exchange Act of 1934.</footnote>
        <footnote id="F2">The stock option became exerciseable in three (3) equal annual installments, commencing one year after the grant date of 12/11/98.</footnote>
        <footnote id="F3">Granted under one of the Issuer's stock option plans, in an exempt transaction under SEC Rule 16(b)-3(d).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Robert A. Licht, Attorney in Fact for Phillip A. Sharp</signatureName>
        <signatureDate>2008-04-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----