SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q/A

Amendment No. 1

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2005

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________ to _________

[Commission File Number 1-9260]

UNIT CORPORATION

(Exact name of registrant as specified in its charter)

	Delaware	73-1283193
	(State or other jurisdiction of incorporation)	(I.R.S. Employer Identification No.)

	7130 South Lewis, Suite 1000, Tulsa, Oklahoma	74136
	(Address of principal executive offices)	(Zip Code)

	(918) 493-7700
	(Registrant’s telephone number, including area code)

	None
	(Former name, former address and former fiscal year,
	if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes x No o

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act).

Yes x No o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o No x

	Common Stock, $.20 par value	45,859,404
	Class	Outstanding at August 2, 2005

Explanatory Note

This Amendment No. 1 on Form 10-Q/A ("Amendment") to our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2005 ("Report"), initially filed with the Securities and Exchange Commission on August 8, 2005, is being filed to correct the contents of the certifications required under Section 302 of the Sarbanes-Oxley Act of 2002 that were originally filed with the Report. No other information contained in the Report is being amended. Accordingly, this Amendment should be read in conjunction with the Report and our filings made with the Securities and Exchange Commission subsequent to the filing of the Report, including any amendments to those filings.

1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this amendment to the Registrant's report to be signed on its behalf by the undersigned thereunto duly authorized.

UNIT CORPORATION

Date:

November 18, 2005

By:

/s/ Larry D. Pinkston

LARRY D. PINKSTON

Chief Executive Officer and Director

Date:

November 18, 2005

By:

/s/ David T. Merrill

DAVID T. MERRILL

Chief Financial Officer and

Treasurer

2

Exhibit 31.1

Certification by Larry D. Pinkston

Pursuant to Securities Exchange Act Rule 13a-14(a) and

Section 302 of the Sarbanes-Oxley Act of 2002

I, Larry D. Pinkston, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Unit Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: November 18, 2005

/s/ Larry D. Pinkston

LARRY D. PINKSTON

Chief Executive Officer

and Director

Exhibit 31.2

Certification by David T. Merrill

Pursuant to Securities Exchange Act Rule 13a-14(a) and

Section 302 of the Sarbanes-Oxley Act of 2002

I, David T. Merrill, certify that: