Benedict F. Kaiser, 64, director of field services and benefits at the National Telephone Cooperative Association, died of cancer Monday at his home in Arlington.

Mr. Kaiser, who was born in Little Falls, Minn., served in the Navy during World War II and was stationed in Washington. After the war, he remained here and earned bachelor's and master's degrees in business administration and accounting at Southeastern University. He became a certified public accountant.

Although he had worked for the Gulf Oil Company while attending Southeastern, Mr. Kaiser became a specialist in insurance and accounting. From 1950 to 1958, he worked in the Washington office of the World Insurance Company. From 1958 to 1973, he was an insurance and accounting official with the National Rural Electric Cooperative Association.

In 1973, he joined the National Telephone Cooperative Association, which represents independent telephone companies and cooperatives, and was in charge of its insurance programs.

Mr. Kaiser had lived in Arlington since 1942. He was a member of the American Society of Association Executives. He also was a member of the parish of St. Agnes Catholic Church in Arlington and of the Edward Douglas White Council of the Knights of Columbus. He was a member of the Washington Golf and Country Club, where he played golf.

Survivors include his wife of 41 years, Joyce, of Arlington; three sisters, Carolyn Marsolek of Little Falls, and Ruth Plakut, and Marie Sobiech, both of Milwaukee, and three brothers, Victor, Edmund and Jerome Kaiser, all of Little Falls.