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

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-09-20</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001219120</issuerCik>
        <issuerName>ADVENT CLAYMORE CONVERTIBLE SECURITIES &amp; INCOME FUND</issuerName>
        <issuerTradingSymbol>AVK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001342021</rptOwnerCik>
            <rptOwnerName>Black Daniel</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2>1065 AVENUE OF THE AMERICAS, 31ST FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10018</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Trustee</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Michael Saarinen is signing on behalf of Daniel Black pursuant to a power of attorney (previously filed).</remarks>

    <ownerSignature>
        <signatureName>Michael Saarinen</signatureName>
        <signatureDate>2005-11-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
