-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 LX0PEIgz9Oppbxvgy15bJcRoYc5QZRqLHPICFMF7iU5Q63HVU4k6appweRckx/Fi
 J70lGaZTLu/srQcmzN2EbA==

<SEC-DOCUMENT>0000903954-07-000026.txt : 20070727
<SEC-HEADER>0000903954-07-000026.hdr.sgml : 20070727
<ACCEPTANCE-DATETIME>20070727101438
ACCESSION NUMBER:		0000903954-07-000026
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070725
FILED AS OF DATE:		20070727
DATE AS OF CHANGE:		20070727

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:		ELEVEN MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		212-325-2000

	MAIL ADDRESS:	
		STREET 1:		ELEVEN MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010

	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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ARZAC ENRIQUE R
		CENTRAL INDEX KEY:			0001009234

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05012
		FILM NUMBER:		071005024

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		2128544401

	MAIL ADDRESS:	
		STREET 1:		COLUMBIA UNIV GRADUATE SCHOOL OF BUS
		STREET 2:		116TH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10027
</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>2007-07-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001009234</rptOwnerCik>
            <rptOwnerName>ARZAC ENRIQUE R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>COLUMBIA UNIV GRADUATE SCHOOL OF BUS</rptOwnerStreet1>
            <rptOwnerStreet2>116TH STREET</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10027</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle>Chair of the Board</officerTitle>
            <otherText>Nominating Committee Chairman</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-07-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>857.8811</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.87</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14134.9018</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 78.2327 shares acquired on 7/20/2007, 6/15/2007, 5/15/2007, 4/16/2007, 3/21/2007, 2/22/2007 and 1/16/2007 as part of the fund's dividend reinvestment plan</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Karen Regan, as attorney-in-fact</signatureName>
        <signatureDate>2007-07-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
