Ollie Roscoe McGuire, 63, a former partner in the Washington law firm of Hogan & Hartson, died of a lung aliment Saturday at his home in Stuart, Fla.

Mr. McGuire went to work for Hogan & Hartson as a clerk in 1934, when he was a law student at George Washington University. He became one of its lawyers after earning a law degree in 1937. After further studies at Georgetown University Law School, he specialized in corporate and labor law. He was made a partner of the firm and remained with it until he resigned in 1967.

The following year, he moved from Vienna, Va., where he had lived for more than 20 years, to Annapolis, and engaged in real estate development. He moved to Stuart earlier this year.

Mr. McGuire was born in Dry Prong, La. His family moved to Washington when he was 3 years old and grew up here. He was a graduate of the University of Virginia.

He served in the Navy during the World War II and was assigned to convoy duty in the Atlantic.

He was a member of the Fairfax Hunt Club, the Annapolis Yacht Club, the Chevy Chase Club, the American Legion, the Historical Society of Fairfax County, the Annapolis Rotary Club, and the John Paul Jones chapter of the Sons of the American Revolution in Annapolis.

Survivors include is wife, Dorothy Haney Letts McGuire, of the home in Stuart; two children, Dickinson Hale McGuire and Melissa M. Moss, both of Annapolis; a sister, Grace M. Weppner, of Chevy Chase, and five grandchildren.