LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS



	Know all by these presents, that the undersigned's hereby makes,
constitutes and appoints David L. Roland and Debra A. Addington, or either
of them, as the undersigned's true and lawful attorney-in-fact, with full
power and authority as hereinafter described on behalf of and in the name,
place and stead of the undersigned to:

(1)	prepare, execute,
acknowledge, deliver and file Forms 3, 4, and 5 (including any amendments
thereto) with respect to the securities of Input/Output,Inc., a Delaware
corporation (the "Company"), with the United States Securities and Exchange
Commission, any national securities exchanges and the Company, as
considered necessary or advisable under Section 16(a) of the Securities
Exchange Act of 1934 and the rules and regulations promulgated thereunder,
as amended from time to time (the "Exchange Act");

(2)	seek or obtain,
as the undersigned's representative and on the undersigned's behalf,
information on transactions in the Company's securities from any third
party, including brokers, employee benefit plan administrators and
trustees, and the undersigned hereby authorizes any such person to release
any such information to the undersigned and approves and ratifies any such
release of information; and

(3)	perform any and all other acts which
in the discretion of such attorney-in-fact are necessary or desirable for
and on behalf of the undersigned in connection with the foregoing.

The
undersigned acknowledges that:

(1)	this Power of Attorney authorizes,
but does not require, such attorney-in-fact to act in their discretion on
information provided to such attorney-in-fact without independent
verification of such information;

(2)	any documents prepared and/or
executed by such attorney-in-fact on behalf of the undersigned pursuant to
this Power of Attorney will be in such form and will contain such
information and disclosure as such attorney-in-fact, in his or her
discretion, deems necessary or desirable;

(3)	neither the Company nor
such attorney-in-fact assumes (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such
requirements, or (iii) any obligation or liability of the undersigned for
profit disgorgement under Section 16(b) of the Exchange Act; and


(4)	this Power of Attorney does not relieve the undersigned from
responsibility for compliance with the undersigned's obligations under the
Exchange Act, including without limitation the reporting requirements under
Section 16 of the Exchange Act.

	The undersigned hereby gives and
grants the foregoing attorney-in-fact full power and authority to do and
perform all and every act and thing whatsoever requisite, necessary or
appropriate to be done in and about the foregoing matters as fully to all
intents and purposes as the undersigned might or could do if present,
hereby ratifying all that such attorney-in-fact of, for and on behalf of
the undersigned, shall lawfully do or cause to be done by virtue of this
Limited Power of Attorney.

	This Power of Attorney shall remain in
full force and effect until revoked by the undersigned in a signed writing
delivered to such attorney-in-fact.

	IN WITNESS WHEREOF, the
undersigned has caused this Power of Attorney to be executed as of this
28th day of July, 2004.





									   /s/ S.
James Nelson		 						   Signature



									   S.
James Nelson
						Print Name



STATE OF 	Texas


COUNTY OF 	Fort Bend



	On this 28th day of July, 2004,
James Nelson personally appeared before me, and acknowledged that s/he
executed the foregoing instrument for the purposes therein contained.


	IN WITNESS WHEREOF, I have hereunto set my hand and official seal.




									   /s/Karolyn Ratajczak
						Notary Public




									   09/30/2005
						My Commission Expires: