-----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,
 PPcGfznTBH1qsf62gabT4k/7AdUNaTqy6xFUlD930R6frQ34F8sZMpcXcLXM8MGq
 jlQOYHffvrKfErFhcJYK7A==

<SEC-DOCUMENT>0000937617-04-000016.txt : 20041026
<SEC-HEADER>0000937617-04-000016.hdr.sgml : 20041026
<ACCEPTANCE-DATETIME>20041026192833
ACCESSION NUMBER:		0000937617-04-000016
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041022
FILED AS OF DATE:		20041026
DATE AS OF CHANGE:		20041026

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COMDISCO HOLDING CO INC
		CENTRAL INDEX KEY:			0001179484
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER RENTAL & LEASING [7377]
		IRS NUMBER:				542066534
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		6111 N RIVER RD
		CITY:			ROSEMONT
		STATE:			IL
		ZIP:			60018
		BUSINESS PHONE:		8476983000

	MAIL ADDRESS:	
		STREET 1:		6111 NORTH RIVER RD
		CITY:			ROSEMONT
		STATE:			IL
		ZIP:			60018

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DAVIDSON M H & CO LLC /NY/
		CENTRAL INDEX KEY:			0000937617
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49968
		FILM NUMBER:		041097797

	BUSINESS ADDRESS:	
		STREET 1:		885 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2123713000

	MAIL ADDRESS:	
		STREET 1:		885 THIRD AVE
		STREET 2:		STE 2200
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER NAME:	
		FORMER CONFORMED NAME:	DAVIDSON M H & CO INC/
		DATE OF NAME CHANGE:	19950425
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-10-22</periodOfReport>

    <issuer>
        <issuerCik>0001179484</issuerCik>
        <issuerName>COMDISCO HOLDING CO INC</issuerName>
        <issuerTradingSymbol>CDCO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000937617</rptOwnerCik>
            <rptOwnerName>DAVIDSON M H &amp; CO LLC /NY/</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-10-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>40</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>21.03</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>109</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person may be deemed to be the beneficial owner of 109 shares of the Issuer's common stock, par value $.01 per share (&quot;Shares&quot;), which represents less than 10% of the Issuer's outstanding Shares.  However, the Reporting Person may be deemed to be a member of a &quot;group&quot; pursuant to Section 13(d) of the Act, that may be deemed to have aggregate beneficial ownership of more than 10% of the Issuer's outstanding Shares.  The filing of this statement shall not be deemed an admission that the Reporting Person is a member of any such &quot;group&quot; or that the Reporting Person is the beneficial owner of any Shares or securities owned by any other person.  The filing of this statement also shall not be deemed a determination that this filing is required under Section 16(a) of the Act.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Thomas L. Kempner, Jr., General Partner of M.H. Davidson &amp; Co.</signatureName>
        <signatureDate>2004-10-26</signatureDate>
    </ownerSignature>
</ownershipDocument>

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