Exhibit 99.1

FOR IMMEDIATE RELEASE

Contact: M. Keith Waddell

Vice Chairman, President and

Chief Financial Officer

(650) 234-6000

ROBERT HALF INTERNATIONAL INC. REPORTS RECORD REVENUES AND EARNINGS FOR THE SECOND QUARTER OF 2006

MENLO PARK, California, July 25, 2006--Robert Half International Inc. (NYSE symbol: RHI) today reported record revenues and earnings for the second quarter ended June 30, 2006.

For the quarter ended June 30, 2006, net income was $68.7 million or $.39 per share, on revenues of $981.8 million. Net income for the prior year’s second quarter was $57.2 million or $.33 per share, on revenues of $816.7 million.

For the six months ended June 30, 2006, net income was $134.2 million or $.77 per share, on revenues of $1.9 billion. For the six months ended June 30, 2005, net income was $108.8 million or $.62 per share, on revenues of $1.6 billion.

Harold M. Messmer, Jr., chairman and chief executive officer of Robert Half International Inc., said: “We reported record revenue and earnings results during the quarter. Revenues and income per share increased 20 percent and 19 percent, respectively, over the same period last year.

“The strength during the quarter was broad-based as the company achieved double-digit, year-over-year revenue gains in each of our staffing divisions and Protiviti,” Messmer said. “We were particularly pleased with the performance of our permanent placement division, Robert Half Finance & Accounting, which saw a 55 percent increase in revenues versus last year.”

Messmer noted that the company’s Protiviti subsidiary also had a solid quarter led by revenue gains in each of its international locations, particularly in Asia.

Robert Half International management will conduct a conference call today at 5 p.m. EDT following the release. The dial-in number is 800-540-0559 (+1-785-832-1508 outside the United States) and the passcode is “Robert Half International.” A taped recording of this call will be available for replay beginning at approximately 8 p.m. EDT today and ending at 8 p.m. EDT on August 1. The dial-in number for the replay is 800-723-1517 (+1-402-220-2659 outside the United States). The conference call also will be archived in audio format on the company’s website at www.rhi.com.

Founded in 1948, Robert Half International Inc. (RHI) is the world’s first and largest specialized staffing firm. RHI is a recognized leader in professional consulting and staffing services, and is the parent company of Protiviti^® (www.protiviti.com), a leading independent internal audit and risk consulting firm. The company’s specialized staffing divisions include Accountemps^®, Robert Half^® Finance & Accounting and Robert Half^® Management Resources, for temporary, full-time and project professionals, respectively, in the fields of accounting and finance; OfficeTeam^®, for highly skilled temporary administrative support personnel; Robert Half^® Technology, for information technology professionals; Robert Half^® Legal, for legal personnel; and The Creative Group^®, for advertising, marketing and web design professionals. The company has staffing and consulting operations in more than 400 locations worldwide.

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Certain information contained in this press release may be deemed forward-looking statements regarding events and financial trends that may affect the company’s future operating results or financial positions. These statements may be identified by words such as “estimate”, “forecast”, “project”, “plan”, “intend”, “believe”, “expect”, “anticipate”, or variations or negatives thereof, or by similar or comparable words or phrases. Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the statements.

These risks and uncertainties include, but are not limited to, the following: changes in levels of unemployment and other economic conditions in the United States or foreign countries where the company does business, or in particular regions or industries; reduction in the supply of candidates for temporary employment or the company’s ability to attract candidates; the entry of new competitors into the marketplace or expansion by existing competitors; the ability of the company to maintain existing client relationships and attract new clients in the context of changing economic or competitive conditions; the impact of competitive pressures, including any change in the demand for the company’s services, on the company’s ability to maintain its margins; the possibility of the company incurring liability for its activities, including the activities of its temporary employees, or for events impacting its temporary employees on clients’ premises; the possibility that adverse publicity could impact the company’s ability to attract and retain clients and candidates; the success of the company in attracting, training, and retaining qualified management personnel and other staff employees; whether governments will impose additional regulations or licensing requirements on personnel services businesses in particular or on employer/employee relationships in general; whether there will be ongoing demand for Sarbanes-Oxley or other regulatory compliance services; and litigation relating to prior or current transactions or activities, including litigation that may be disclosed from time to time in the company’s SEC filings.

Additionally, with respect to Protiviti, other risks and uncertainties include the fact that future success will depend on its ability to retain employees and attract clients; there can be no assurance that there will be ongoing demand for Sarbanes-Oxley or other regulatory compliance services; failure to produce projected revenues could adversely affect financial results; and there is the possibility of involvement in litigation relating to prior or current transactions or activities.

Because long-term contracts are not a significant part of the company’s business, future results cannot be reliably predicted by considering past trends or extrapolating past results. The company undertakes no obligation to update information contained in this release.

A copy of this press release is available at www.rhi.com.

ATTACHED:	Summary of Operations
	Supplemental Financial Information

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ROBERT HALF INTERNATIONAL INC. AND SUBSIDIARIES

SUMMARY OF OPERATIONS

(in thousands, except per share amounts)

	Quarter Ended June 30,						Six Months Ended June 30,
	2006			2005			2006			2005
	(Unaudited)						(Unaudited)
Net service revenues	$	981,825		$	816,711		$	1,925,749		$	1,586,659
Direct costs of services		563,823			480,430			1,114,543			936,544
Gross margin		418,002			336,281			811,206			650,115
Selling, general and administrative expenses		308,173			244,071			595,655			474,386
Amortization of intangible assets		228			74			374			148
Interest income		(4,129	)		(2,147	)		(7,626	)		(3,979	)
Income before income taxes		113,730			94,283			222,803			179,560
Provision for income taxes		45,075			37,054			88,645			70,738
Net income	$	68,655		$	57,229		$	134,158		$	108,822
Diluted net income per share	$	.39		$	.33		$	.77		$	.62
Shares:
Basic		167,799			167,285			167,595			168,585
Diluted		174,096			172,387			174,036			174,304

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ROBERT HALF INTERNATIONAL INC. AND SUBSIDIARIES

SUPPLEMENTAL FINANCIAL INFORMATION

(in thousands)

	Quarter Ended June 30,				Six Months Ended June 30,
	2006		2005		2006		2005
	(Unaudited)				(Unaudited)
REVENUES:
Accountemps	$	362,641	$	304,560	$	718,218	$	589,532
OfficeTeam		192,694		169,181		378,890		325,122
Robert Half Technology		88,105		73,481		172,735		140,497
Robert Half Management Resources		124,915		102,283		245,281		207,326
Robert Half Finance & Accounting		85,552		55,298		161,036		101,527
Protiviti		127,918		111,908		249,589		222,655
Total	$	981,825	$	816,711	$	1,925,749	$	1,586,659
GROSS MARGIN:
Temporary and consultant staffing	$	285,878	$	235,329	$	560,452	$	457,783
Permanent placement staffing		85,552		55,298		161,036		101,527
Risk consulting and internal audit services		46,572		45,654		89,718		90,805
Total	$	418,002	$	336,281	$	811,206	$	650,115
OPERATING INCOME:
Temporary and consultant staffing	$	76,321	$	58,020	$	153,154	$	110,127
Permanent placement staffing		20,556		13,218		37,456		22,750
Risk consulting and internal audit services		12,952		20,972		24,941		42,852
Total	$	109,829	$	92,210	$	215,551	$	175,729
SELECTED CASH FLOW INFORMATION:
Amortization of intangible assets	$	228	$	74	$	374	$	148
Stock options expense	$	4,849	$	—	$	9,944	$	—
Depreciation expense	$	14,840	$	11,832	$	29,801	$	23,538
Capital expenditures	$	19,202	$	8,822	$	43,514	$	21,473
Open market repurchases of common stock (shares)		1,134		3,393		2,359		4,948

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ROBERT HALF INTERNATIONAL INC. AND SUBSIDIARIES

SUPPLEMENTAL FINANCIAL INFORMATION

(in thousands)

	June 30,
	2006		2005
	(Unaudited)
SELECTED BALANCE SHEET INFORMATION:
Cash and cash equivalents	$	528,457	$	441,057
Accounts receivable, less allowances	$	509,509	$	417,248
Total assets	$	1,483,129	$	1,231,444
Current liabilities	$	407,335	$	347,319
Notes payable and other indebtedness, less current portion	$	4,206	$	2,753
Total stockholders’ equity	$	1,062,643	$	877,548

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