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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 9XsPnw5R/TdIFH8RrNVM0w==

<SEC-DOCUMENT>0001140361-07-012359.txt : 20070614
<SEC-HEADER>0001140361-07-012359.hdr.sgml : 20070614
<ACCEPTANCE-DATETIME>20070614194617
ACCESSION NUMBER:		0001140361-07-012359
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070612
FILED AS OF DATE:		20070614
DATE AS OF CHANGE:		20070614

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:			Malys Gerald J
		CENTRAL INDEX KEY:			0001365864

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13627
		FILM NUMBER:		07921126

	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>2007-06-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001365864</rptOwnerCik>
            <rptOwnerName>Malys Gerald J</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>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior VP &amp;  CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2007-06-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2625</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.11</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>27675</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 11, 2007 pursuant to which, upon the vesting of restricted ordinary shares, a portion of the newly vested shares is sold to satisfy related income tax withholding requirements.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Robert P. Vogels for Gerald J. Malys Pursuant to Power of Attorney</signatureName>
        <signatureDate>2007-06-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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