<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4/A</documentType><periodOfReport>2003-09-24</periodOfReport><dateOfOriginalSubmission>2003-09-25</dateOfOriginalSubmission><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001013606</issuerCik><issuerName>ENDOLOGIX INC /DE/</issuerName>        <issuerTradingSymbol>ELGX</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001226357</rptOwnerCik><rptOwnerName>THIEL JEFFREY H</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>13900 ALTON PARKWAY</rptOwnerStreet1><rptOwnerStreet2>SUITE 122</rptOwnerStreet2><rptOwnerCity>IRVINE</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>92618</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-24</value></transactionDate><deemedExecutionDate><value>2003-09-24</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1279.0000</value></transactionShares><transactionPricePerShare><value>4.0500</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>51192.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Family Trust</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes></footnotes><remarks></remarks><ownerSignature><signatureName>Jeffrey H. Thiel</signatureName><signatureDate>2004-01-06</signatureDate></ownerSignature></ownershipDocument>

