-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 MJqUOjX05AS3oBQPX2aq7jb/TDeMM7kSsAcItfQXcdfFUO4EoHj456KnK5SQQ8jy
 /O/jcLRnT2dS5bXiab4slg==

<SEC-DOCUMENT>0000903954-06-000114.txt : 20061229
<SEC-HEADER>0000903954-06-000114.hdr.sgml : 20061229
<ACCEPTANCE-DATETIME>20061229161721
ACCESSION NUMBER:		0000903954-06-000114
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061227
FILED AS OF DATE:		20061229
DATE AS OF CHANGE:		20061229

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RAPPAPORT STEVEN N
		CENTRAL INDEX KEY:			0001211192

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05012
		FILM NUMBER:		061306039

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		2129069000

	MAIL ADDRESS:	
		STREET 1:		RZ CAPITAL LLC
		STREET 2:		40 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CREDIT SUISSE ASSET MANAGEMENT INCOME FUND INC
		CENTRAL INDEX KEY:			0000810766
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				232451535
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		466 LEXINGTON AVENUE
		STREET 2:		16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212-875-3500

	MAIL ADDRESS:	
		STREET 1:		73 TREMONT ST
		STREET 2:		8TH FL
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02108

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CSAM INCOME FUND
		DATE OF NAME CHANGE:	19990830

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BEA INCOME FUND INC
		DATE OF NAME CHANGE:	19950828

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CS FIRST BOSTON INCOME FUND INC
		DATE OF NAME CHANGE:	19950420
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-12-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000810766</issuerCik>
        <issuerName>CREDIT SUISSE ASSET MANAGEMENT INCOME FUND INC</issuerName>
        <issuerTradingSymbol>CIK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001211192</rptOwnerCik>
            <rptOwnerName>RAPPAPORT STEVEN N</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>LEHIGH COURT LLC</rptOwnerStreet1>
            <rptOwnerStreet2>40 EAST 52ND STREET</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-12-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>722.2222</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.32</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6518.788</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The total shares held following this transaction includes 27.335 shares acquired on 12/20/2006, 11/20/2006, 10/19/2006 9/20/2006 and 8/18/2006 as part of the fund's dividend reinvestment plan</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Karen Regan, as attorney-in-fact</signatureName>
        <signatureDate>2006-12-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
