-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 R22zzKTAzJbA6ewh5r0ZeBOnJywgR5h8jDmMIU4smZdJEy26WlGNgoICEZeBCDPM
 vm+MlzT9jIfk4h/u4x9LFw==

<SEC-DOCUMENT>0001016731-05-000001.txt : 20050425
<SEC-HEADER>0001016731-05-000001.hdr.sgml : 20050425
<ACCEPTANCE-DATETIME>20050425160918
ACCESSION NUMBER:		0001016731-05-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050421
FILED AS OF DATE:		20050425
DATE AS OF CHANGE:		20050425

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TUT SYSTEMS INC
		CENTRAL INDEX KEY:			0000878436
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				942958543
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6000 SW MEADOWS RD, SUITE #200
		CITY:			LAKE OSWEGO
		STATE:			OR
		ZIP:			97035
		BUSINESS PHONE:		971-217-0400

	MAIL ADDRESS:	
		STREET 1:		6000 SW MEADOWS RD, SUITE #200
		CITY:			LAKE OSWEGO
		STATE:			OR
		ZIP:			97035

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TUTANKHAMON ELECTRONICS INC
		DATE OF NAME CHANGE:	19940308

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MOORE ROGER H/CA
		CENTRAL INDEX KEY:			0001204825

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25291
		FILM NUMBER:		05770191

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		6509617500

	MAIL ADDRESS:	
		STREET 1:		487 EAST MIDDLEFIELD ROAD
		STREET 2:		ATTN: GENERAL COUNSEL
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043
</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>2005-04-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000878436</issuerCik>
        <issuerName>TUT SYSTEMS INC</issuerName>
        <issuerTradingSymbol>tuts</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001204825</rptOwnerCik>
            <rptOwnerName>MOORE ROGER H/CA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6000 SW MEADOWS ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>LAKE OSWEGO</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97035</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Qualified Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.04</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-04-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>15000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-04-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This option vests equally over 12 months and vesting began on May 19, 2004.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By Randall Gausman For Roger Moore</signatureName>
        <signatureDate>2005-04-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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