Peter A. Mallios, 85, a Washington restaurant owner for more than 25 years, died of congestive heart failure Aug. 28 at his Washington home.

He purchased the ald Greenbriar Restaurant located near a corner of Connecticut Avenue and K Street NW in 1945. Five years later he purchased the Trio Restaurant at 17th and Q streets NW, which he operated until retiring about five years ago.

Mr. Mallios was a native of Arcadia, Greece. He came to this country in 1904 and lived in Chicago, New York, and Wilkes-Barre, Pa. before moving to Washington in 1940.

He served in the Army in World War I and saw action in the Argonne Forest campaign.

He was a life member of the American Legion and was named man of the year by Adelphia Post No. 38 in 1973.

He was belonged to the Veterans of Foreign Wars and the Order of Ahepa.

Mr. Mallios was a Shriner and had belonged to the Masons for nearly 60 years.

He was a member of St. Sophia Greek Orthodox Cathedral.

He is survived by his wife of 50 years, Helen Mallios, of the home; a daughter, Margarita Ladas, and two sons, Dimitri Mallios and Georle P. Mallios, all of Washington, and seven grandchildren.