UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): December 30, 2005

Administaff, Inc.

(Exact name of registrant as specified in its charter)

Delaware	1-13998	76-0479645
(State or other jurisdiction of	(Commission	(I.R.S. Employer
incorporation)	File Number)	Identification No.)

19001 Crescent Springs Drive

Kingwood, Texas 77339

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (281) 358-8986

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under The Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under The Exchange Act (17 CFR 240.13e-4(c))

Item 1.01. Entry into a Material Definitive Agreement

On December 30, 2005, the Company acquired a 2005 Embraer Legacy (“Legacy”) aircraft from John Wing Aviation, LLC (“Wing”). The Company traded in its existing aircraft and paid Wing an additional $19 million for the Legacy.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ADMINISTAFF, INC.
	By:	/s/ John H. Spurgin, II
		John H. Spurgin, II
		Sr. Vice President, Legal, General Counsel and Secretary
Date: December 30, 2005