<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-06-15</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001318310</issuerCik>
        <issuerName>ev3 Inc.</issuerName>
        <issuerTradingSymbol>EVVV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001329810</rptOwnerCik>
            <rptOwnerName>Cameron Michael E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O EV3 INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4600 NATHAN LANE NORTH</rptOwnerStreet2>
            <rptOwnerCity>PLYMOUTH</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55442</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President, Operations</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Options to purchase common stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>8.82</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-09-20</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-09-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock, par value $0.01 per share</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>33333</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Options to purchase common stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>8.82</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-01-07</value>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-01-07</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock, par value $0.01 per share</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The reporting person holds the office of Vice President, Operations of ev3 Inc., a Delaware corporation (the &quot;Company&quot;) and wholly owned subsidiary of ev3 LLC, a Delaware limited liability company (&quot;ev3 LLC&quot;).  Pursuant to an Agreement and Plan of Merger, dated as of April 4, 2005, by and between the Company and ev3 LLC, prior to the consummation of the initial public offering (the &quot;IPO&quot;) of shares of common stock, par value $0.01 per share (&quot;Common Stock&quot;), of the Company, ev3 LLC will be merged with and into the Company (the &quot;Merger&quot;), with the Company surviving the Merger.  In connection with the Merger, the reporting person's options to purchase membership interests in ev3 LLC will be converted into options to purchase the specified number of shares of Common Stock, after giving effect to a one for six reverse stock split that will occur following the Merger.</footnote>
        <footnote id="F2">Shares subject to these options will vest and become exercisable as to 1/4 of the shares on September 20, 2005 and 1/36 of the shares will vest and become exercisable each month thereafter for 36 months.</footnote>
        <footnote id="F3">Shares subject to these options will vest and become exercisable as to 1/4 of the shares on January 7, 2006 and 1/36 of the shares will vest and become exercisable each month thereafter for 36 months.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael E. Cameron</signatureName>
        <signatureDate>2005-06-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
