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

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

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

    <noSecuritiesOwned>1</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001241282</rptOwnerCik>
            <rptOwnerName>WILDER THOMAS C III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MICRO THERAPEUTICS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2 GOODYEAR</rptOwnerStreet2>
            <rptOwnerCity>IRVINE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92168</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President , Neurovascular Div.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>The reporting person holds the office of President, Neurovascular Division 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;).  The reporting  person does not have any beneficial ownership interest in the Company or ev3 LLC.</remarks>

    <ownerSignature>
        <signatureName>/s/ Thomas C. Wilder III</signatureName>
        <signatureDate>2005-06-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
