SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the Month of August, 2011

KOREA ELECTRIC POWER CORPORATION

(Translation of registrant’s name into English)

167, Samseongdong, Gangnam-gu, Seoul 135-791, Korea

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  x            Form 40-F  ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ¨

Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ¨            No   x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-            .

This Report of Foreign Private Issuer on Form 6-K is deemed filed for all purposes under the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended.

Korea Electric Power Corporation (“KEPCO”) hereby announces its unaudited consolidated estimated earnings results for the first half of 2010 and 2011 as attached hereto.

Disclaimer:

The financial information relating to the consolidated results of operations of Korea Electric Power Corporation (“KEPCO”) for the first half ended June 30, 2010 and 2011 as presented below (the “Information”) has been prepared by KEPCO based on preliminary internal estimates. The Information has been prepared on a consolidated basis based on Korean IFRS. The Information has neither been audited nor reviewed by KEPCO’s independent accountants, Deloitte Anjin LLC., or any other independent public accountants. The Information may differ significantly from the actual consolidated financial results of operations of KEPCO for the first half ended June 30, 2011, and accordingly should not be relied upon for investment, including but not limited to purchase of any securities, or for other purposes.

Korea Electric Power Corporation

PRELIMINARY CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)

For the first half ended June 30, 2010 and 2011

(Unit : in billions of Korean Won)	1H 2011		1H 2010		Change
Operating revenues:		19,916		17,776		12.0	%
Sale of electric power		18,812		17,078		10.1	%
Other		1,104		698		58.3	%
Operating expenses:		21,583		18,311		17.9	%
Fuel		10,770		9,087		18.5	%
Maintenance		698		703		-0.7	%
Depreciation		2,913		2,927		-0.5	%
Purchased power		3,663		2,531		44.8	%
Research and development		328		279		17.8	%
Other		3,212		2,785		15.3	%
Other revenues		442		406		8.9	%
Other expenses		78		49		61.3	%
Operating income(loss)		-1,304		-178		-632.6	%
Finance income:		769		470		63.4	%
Interest income		67		58		14.9	%
FX related gain		685		410		67.2	%
Other		17		3		500.0	%
Finance expenses:		1,526		1,485		2.7	%
Interest expense		1,065		974		9.4	%
FX related loss		461		512		-9.9	%
Other		—		—		—	%
Equity income(loss) of affiliates, net		166		88		88.3	%
Gain(Loss) on disposal of affiliates		3		-52		106.2	%
Income(Loss) before income tax		-1,892		-1,157		-63.6	%
Income tax expenses(benefits)		-287		-103		-179.3	%
Net Income(loss)		-1,605		-1,054		-52.3	%
Non controlling interest		31		33		-7.2	%
Controlling interest		-1,636		-1,087		-50.5	%

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, thereunto duly authorized.

By:	/s/    Shin, Chang-keun
Name:	Shin, Chang-keun
Title:	Vice President

Date: August 16, 2011