-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 ehFjVtHmlx2Itw6f/pQ3CA==

<SEC-DOCUMENT>0001140361-07-012125.txt : 20070611
<SEC-HEADER>0001140361-07-012125.hdr.sgml : 20070611
<ACCEPTANCE-DATETIME>20070611172315
ACCESSION NUMBER:		0001140361-07-012125
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070607
FILED AS OF DATE:		20070611
DATE AS OF CHANGE:		20070611

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			APEX SILVER MINES LTD
		CENTRAL INDEX KEY:			0001011509
		STANDARD INDUSTRIAL CLASSIFICATION:	GOLD & SILVER ORES [1040]
		IRS NUMBER:				841363747
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		CALEDONIAN HOUSE MARY STREET
		STREET 2:		GEORGETOWN BWI
		CITY:			GRAND CAYMAN ISLAND
		BUSINESS PHONE:		3038395060

	MAIL ADDRESS:	
		STREET 1:		CALEDONIAN HOUSE MARY STREET
		STREET 2:		GEORGETOWN BWI
		CITY:			GRAND CAYMAN ISLAND

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Clevenger Jeffrey G
		CENTRAL INDEX KEY:			0001305268

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13627
		FILM NUMBER:		07913218

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		303-839-5060

	MAIL ADDRESS:	
		STREET 1:		1700 LINCOLN STREET
		STREET 2:		SUITE 3050
		CITY:			DENVER
		STATE:			CO
		ZIP:			80203
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-06-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001011509</issuerCik>
        <issuerName>APEX SILVER MINES LTD</issuerName>
        <issuerTradingSymbol>SIL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001305268</rptOwnerCik>
            <rptOwnerName>Clevenger Jeffrey G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1700 LINCOLN STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3050</rptOwnerStreet2>
            <rptOwnerCity>DENVER</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80203</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-06-07</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2184.47</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2184.47</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2184.47</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each Restricted Stock Unit represents a contingent right to receive one ordinary share of Apex Silver Mines Limited.</footnote>
        <footnote id="F2">The Restricted Stock Units vest on the first anniversary of the date the Restricted Stock Units were granted.  Ordinary shares represented by Restricted Stock Units will be issued to the reporting person effective on the date on which the reporting person ceases to be a member of the Board of Directors of Apex Silver Mines Limited.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Robert P. Vogels for Jeffrey G. Clevenger Pursuant to Power of Attorney</signatureName>
        <signatureDate>2007-06-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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