-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EUMoKPumzXGDPAUqUAnAvNQ2+rkhrijUVf36liIFglUz/Z6lEtGfi/BsocJvmGsN
 z/iMWUrFgDZZlaBsFS7gZQ==

<SEC-DOCUMENT>0001179110-06-006221.txt : 20060314
<SEC-HEADER>0001179110-06-006221.hdr.sgml : 20060314
<ACCEPTANCE-DATETIME>20060314173217
ACCESSION NUMBER:		0001179110-06-006221
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20051101
FILED AS OF DATE:		20060314
DATE AS OF CHANGE:		20060314

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TCW CONVERTIBLE SECURITIES FUND INC
		CENTRAL INDEX KEY:			0000809559
		IRS NUMBER:				930939398
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		865 S FIGUEROA ST STE 1800
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071
		BUSINESS PHONE:		2132440000

	MAIL ADDRESS:	
		STREET 1:		865 S. FIGUEROA STREET,
		STREET 2:		SUITE 1800
		CITY:			LOSANGELES
		STATE:			CA
		ZIP:			90017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SONNEBORN WILLIAM C
		CENTRAL INDEX KEY:			0001198624

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-04980
		FILM NUMBER:		06685998

	BUSINESS ADDRESS:	
		STREET 1:		TCW INVESTMENT MANAGEMENT CO.
		STREET 2:		865 S. FIGUEROA ST.
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 3 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-11-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000809559</issuerCik>
        <issuerName>TCW CONVERTIBLE SECURITIES FUND INC</issuerName>
        <issuerTradingSymbol>TSI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198624</rptOwnerCik>
            <rptOwnerName>SONNEBORN WILLIAM C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TCW STRATEGIC INCOME FUND, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>865 S. FIGUEROA STREET</rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Director of Investment Advisor</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>Philip K. Holl for William C. Sonneborn by POA dtd August 20, 2002</signatureName>
        <signatureDate>2006-03-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24wcs.txt
<TEXT>
EXECUTION COPY
POWER OF ATTORNEY
TCW Convertible Securities Fund, Inc.
        The undersigned hereby constitutes and appoints Michael
E. Cahill, Linda D. Barker, Toni A. Forge, Harold H. Henderson,
Philip K. Holl, Jerry S. Plater and Lazarus N. Sun, and each of
them, his or her true and lawful attorneys-in-fact and agents,
each of them with full power of substitution and resubstitution,
for him or her and in his or her name, place and stead, in any
and all capacities, to sign any or all reports and forms required
under Section 16 of the Securities and Exchange Act of 1934, as
amended, including but not limited to all Form 3, Form 4 and Form
5 filings, and to file the same with the Securities and Exchange
Commission (Commission) and the New York Stock Exchange, granting
unto each of said attorneys-in-fact and agents full power and
authority to do and perform each and every act and thing
necessary or appropriate to be done with respect to such reports
and forms or any amendments or supplements thereto in and about
the premises, as fully to all intents and purposes as he or she
might or could do in person, hereby ratifying and confirming all
that any of said attorneys-in-fact and agents or his or her
substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.
        This Power of Attorney may be terminated at any time by
the undersigned by written notice to each of the attorneys-in-
fact and the Commission; provided, however, that such termination
shall not affect the validity of any lawful action done or
performed by the attorneys-in-fact or any of them, pursuant
thereto, prior to the actual receipt of notice by the attorneys-
in-fact.
        IN WITNESS WHEREOF, the undersigned has executed this
Power of Attorney this 20th day of August, 2002.

                                                /s/_
                                             William C. Sonneborn
G:\CSFINC\SEC16\POA\Sonneborn-W 08-02.doc

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
