Exhibit 5.1

		Dewey & LeBoeuf LLP
		1301 Avenue of the Americas
		New York, NY 10019-6092
		T +1 212 259-8000 F +1 212 259-6333

May 19, 2011

Great Plains Energy Incorporated
1200 Main Street
Kansas City, Missouri 64105

Re:		Great Plains Energy Incorporated Registration Statement on Form S-3

Ladies and Gentlemen:

We have served as special counsel to Great Plains Energy Incorporated, a Missouri corporation (the “Company”), in connection with the issuance and sale by the Company of $350,000,000 4.85% Notes due 2021 (the “Notes”), covered by the Registration Statement on Form S-3 (No. 333-159131) (the “Registration Statement”), including the prospectus constituting a part thereof, dated May 11, 2009, and the final prospectus supplement, dated May 16, 2011 (collectively, the “Prospectus”), filed by the Company with the Securities and Exchange Commission (the “SEC”) under the Securities Act of 1933, as amended (the “Securities Act”).

The Notes were issued under the Company’s Indenture, dated as of June 1, 2004, as heretofore supplemented (the “Original Indenture”) between the Company and The Bank of New York Mellon Trust Company, N.A. (as successor to BNY Midwest Trust Company), as trustee (in such capacity, the “Trustee”), as supplemented by the Fourth Supplemental Indenture, dated as of May 19, 2011, establishing the form, terms and other provisions of the Notes (the “Supplemental Indenture,” and together with the Original Indenture, the “Indenture”). The Notes were sold by the Company pursuant to the Underwriting Agreement, dated May 16, 2011, among the Company, J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and Mitsubishi UFJ Securities (USA), Inc., as representatives of the several underwriters named therein.

In rendering the opinions expressed below, we have examined and relied upon copies of the Registration Statement and the exhibits filed therewith, and the Indenture. We have also examined originals, or copies of originals certified to our satisfaction, of such agreements, documents, certificates and statements of government officials and other instruments, and have examined such

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questions of law and have satisfied ourselves as to such matters of fact, as we have considered relevant and necessary as a basis for this opinion letter. We have assumed the authenticity of all documents submitted to us as originals, the genuineness of all signatures, the legal capacity of all natural persons and the conformity with authentic original documents of any copies thereof submitted to us for examination. We have also assumed that the Indenture has been duly authorized, executed and delivered by the parties thereto and that the Indenture is the valid and legally binding obligation of the Trustee.

Based on the foregoing, and subject to the qualifications and limitations hereinafter set forth, we are of the opinion that the Notes, when duly executed, authenticated and issued as provided in the Indenture and in the manner and for the consideration contemplated by the Registration Statement and the Prospectus, will be legally issued and will constitute the valid and binding obligations of the Company (subject to bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer or other laws of general applicability relating to or affecting the enforcement of creditors’ rights generally and by the effect of general principles of equity, regardless of whether considered in a proceeding in equity or at law).

We express no opinion herein as to the law of any jurisdiction other than the law of the State of New York and the federal law of the United States.

We hereby consent to the filing of this opinion letter as an exhibit to the Registration Statement and to all references to us included in or made a part of the Registration Statement. In giving the foregoing consent, we do not hereby admit that we come within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the SEC thereunder. This opinion may not be relied upon by you for any other purpose or relied upon by or furnished to any other person without our prior written consent.

Very truly yours,

/s/ Dewey & LeBoeuf LLP