Victor H. Evjen, 73, who was assistant chief of probation in the administrative office of the United States Courts for 31 years before retiring in 1971, died Friday in his doctor's office in Bethesda after a heart attack.

He also had been managing editor and then editor of "Federal Probation," a professional publication of the court system, for 30 years.

Mr. Evjen received the Corrections Conference Award of the National Capital Area's Health and Welfare Council in 1962 and the National Council on Crime and Delinquency's Irving W. Halpern Award in 1968.

He was a professional lecturer in criminology at both American and George Washington universities during the 1960s.

Mr. Evjen was a 40-year member of the Lutheran Church of the Reformation in Washington, where he was a Sunday School teacher, Sunday School superintendent and had served on the church council.

He also had been a member of the Lutheran Church of America's Board of Social Missions from 1950 to 1964 and served on its Commission on Marriage and Divorce in 1953.

Mr. Evjen was a native of Gettysburg, Pa. He earned a bachelor's degree at Wittenberg University in Springfield, Ohio, a sociology degree at George Williams College in Downers Grove, Ill., and a master's degree at the University of Chicago.

He began working in the correctional field in 1932 as a probation officer and with the Juvenile Court in Chicago and became a probation and parole officer with U.S. District Court there four years later.

During World War II, Mr. Evjen served as a sociologist with the army's prison system. He also edited a book on the army prison program during the war and conducted a statistical study of army courts marshal.

Survivors include his wife, the former Jessie Heinl, of the home in Kensington; three brothers, Siegfried A., of Tacoma, Wash., Rudolf N., of Pensacola, Fla., and Henry O., of Akron Ohio, and a sister, Myrtle Evjen, of Elmhurst, Ill.

The family suggests that expressions of sympathy be in the form of contributions to the National Lutheran Home.