Frank A. Gunther, 74, a retired president and chairman of the Security National Bank in Washington, died of cardiac arrest June 8 at his home in Kensington.

Mr. Gunther, who was born in Washington, graduated from the old Central High School. He also attended the Washington chapter of the American Institute of Banking and the National University law school.

He worked for the Riggs National Bank from 1925 to 1928 and then became a bank examiner in the Office of the Comptroller of the Currency in the Treasury Department. In World War II, he served in the Navy, rising to the rank of commander.

In 1949, Mr. Gunther resigned from Treasury and became executive vice president of the Security Bank, now the Security National Bank. He was named president in 1960 and chairman in 1969. He held both positions until his retirement in 1975, but continued to serve the bank as a consultant, board member and member of the executive committee.

Mr. Gunther was a former chairman of the D.C. Bankers Law and Legislative Committee and the Washington, D.C., Clearinghouse Association. He also was a former president of the D.C. Bankers Association.

He was a director of the Washington Board of Trade, a director and treasurer of the Better Business Bureau of Metropolitan Washington, a trustee of the Federal City Council, a president of the National Lutheran Home for the Aged and a member of the board of the Lutheran Theological Seminary in Gettysburg, Pa.

In addition, Mr. Gunther was a trustee of the Capital Institute of Technology, a founder of the Boys Club of Silver Spring and a member of the Kiwanis Club, the Columbia Country Club, the Metropolitan Club and the Touchdown Club.

Survivors include his wife, Jeannette W., of Kensington, and two brothers, Lawrence, of Golden Beach, Fla., and Paul, of Coral Springs, Fla.