POWER OF ATTORNEY

1.	Appointment

	BY THIS POWER OF ATTORNEY,
I, the undersigned Chairman of the Board of Directors of SPSS Inc., a
Delaware Corporation (the "Company"), HEREBY APPOINT EMILY BOROM to be my
Attorney and in my name and on my behalf and as my Attorney do any act and
deed or otherwise to negotiate, determine and approve the final form and
content of, complete, sign, execute, exchange and deliver any and all
agreements, documents, letters, forms, instruments of transfer, consents,
and other documents, and to do any and all acts and things as may be
necessary or, in the opinion of my Attorney, desirable or incidental
thereto in connection with or for the purposes of executing documents in
connection with the requirements of the Securities Act of 1933 and the
Securities Exchange Act of 1934 and the rules and regulations promulgated
thereunder.

2.	Intention and Ratification

	I HEREBY UNDERTAKE to
ratify and confirm all acts and things done or lawfully caused to be done
and all agreements, documents, letters, forms, instruments of transfer,
consents and other documents, approved, completed, signed, executed and
delivered whatsoever by my Attorney in my name and on my behalf in
pursuance of the authority conferred in this Power of Attorney and I accept
full responsibility for the contents of the documents referred to above
which may be approved, completed, signed, executed and delivered by my
Attorney in my name and on my behalf.

3.	Indemnity

	I FURTHER
UNDERTAKE to indemnify and keep indemnified my Attorney from and against
all losses, liabilities, costs, claims, actions, expenses, proceedings and
obligations incurred or suffered by my Attorney by reason directly or
indirectly of the exercise or purported exercise of any power conferred
upon him or her.

4.	Duration

	I HEREBY DECLARE that the authority
conferred by this Power of Attorney shall be effective as of August 22,
2003 and shall continue in effect for so long as I am required to file
documents in my individual capacity in connection with the requirements of
the Securities Act of 1933 and the Securities Exchange Act of 1934 with
respect to the Company's securities (the "Duration Period").
Notwithstanding the foregoing, I may, by a written instrument, signed,
acknowledged and delivered to my Attorney during the Duration Period, with
a copy to the Company's Secretary, revoke this Power of Attorney in whole
or in part or amend it from time to time in any respect.

IN WITNESS
WHEREOF, I have executed and delivered this Power of Attorney this 7th day
of August, 2003.

Name:  /s/ Norman Nie


Specimen signature of
Attorney-in-Fact


/s/ Emily Borom


STATE OF Illinois )

			SS.
COUNTY OF Cook )

The undersigned, a notary public in and
for the above county and state, certifies that Norman Nie has caused this
Power of Attorney to be executed and is known to me to be the same person
whose name is subscribed above, appeared before me in person and
acknowledged signing and delivering the instrument as his free and
voluntary act, for the uses and purposes therein set forth, and certified
to the correctness of the signature of the Attorney-in-Fact.

Dated:
August 14, 2003

/s/ Desiree D. Urban
Notary Public


My
commission expires:
March 3, 2007