-----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,
 GAbiwxTCWkJMdKGWlbuQ7wnL1HRh4yR3pN/f9wwb0aOkyLi+EfpCmnxDfIke0pJr
 n1dSqyTR6IULykj1peGt2A==

<SEC-DOCUMENT>0001104659-05-034999.txt : 20050729
<SEC-HEADER>0001104659-05-034999.hdr.sgml : 20050729
<ACCEPTANCE-DATETIME>20050729111525
ACCESSION NUMBER:		0001104659-05-034999
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050729
FILED AS OF DATE:		20050729
DATE AS OF CHANGE:		20050729

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WILLIAMS JOHN ANTHONY
		CENTRAL INDEX KEY:			0001283570

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27956
		FILM NUMBER:		05983255

	MAIL ADDRESS:	
		STREET 1:		5 BILLERICA PARK
		STREET 2:		101 BILLERICA AVE
		CITY:			NORTH BILLERCA
		STATE:			MA
		ZIP:			01862

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PHYSIOMETRIX INC
		CENTRAL INDEX KEY:			0001010397
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				770238187
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		FIVE BILLERICA PARK
		STREET 2:		101 BILLERICA AVE
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862
		BUSINESS PHONE:		5086702422

	MAIL ADDRESS:	
		STREET 1:		FIVE BILLERICA PARK
		STREET 2:		101 BILLERICA AVE
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-29</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001010397</issuerCik>
        <issuerName>PHYSIOMETRIX INC</issuerName>
        <issuerTradingSymbol>PHYX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001283570</rptOwnerCik>
            <rptOwnerName>WILLIAMS JOHN ANTHONY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5 BILLERICA PARK</rptOwnerStreet1>
            <rptOwnerStreet2>101 BILLERICA AVE</rptOwnerStreet2>
            <rptOwnerCity>NORTH BILLERICA</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01862</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.71</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-03-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>300000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-03-22</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-03-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityValue>
                    <value>300000</value>
                </underlyingSecurityValue>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>300000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Option to purchase common stock, One eighth of the shares are exercisable after six months and an additional one forty eighth of the shares are exerciseable on the same day of each calander month thereafter until fully vested. Excludes various options to reporting person previously reported.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>John A Williams</signatureName>
        <signatureDate>2005-07-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----