-----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,
 AkgY6gMKTdW0TxBDrmvT264NvM1Xh+NGl4LoE079I4ctp3d8Wdn5o1a3Ml+Mx8QV
 gbm4Qwyt0t8rrnhF0vID5A==

<SEC-DOCUMENT>0001284463-06-000001.txt : 20060103
<SEC-HEADER>0001284463-06-000001.hdr.sgml : 20060102
<ACCEPTANCE-DATETIME>20060103091447
ACCESSION NUMBER:		0001284463-06-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051230
FILED AS OF DATE:		20060103
DATE AS OF CHANGE:		20060103

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Horvath Susan
		CENTRAL INDEX KEY:			0001322846

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-16612
		FILM NUMBER:		06500187

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		952-229-1545

	MAIL ADDRESS:	
		STREET 1:		4645 ITHACA LANE
		CITY:			PLYMOUTH
		STATE:			MN
		ZIP:			55446

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CNS INC /DE/
		CENTRAL INDEX KEY:			0000814258
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				411580270
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 39802
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55439
		BUSINESS PHONE:		6128206696

	MAIL ADDRESS:	
		STREET 1:		PO BOX 39802
		STREET 2:		PO BOX 39802
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55439
</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>2005-12-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000814258</issuerCik>
        <issuerName>CNS INC /DE/</issuerName>
        <issuerTradingSymbol>CNXS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001322846</rptOwnerCik>
            <rptOwnerName>Horvath Susan</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4645 ITHACA LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PLYMOUTH</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55446</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, International</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3440</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares of common stock owned include 128 shares purchased through Employee Stock Purchase Plan on December 30, 2005.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Michael Weber, by Power of Attorney</signatureName>
        <signatureDate>2006-01-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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