Eula F. Novotny, 61, assistant manager of Maryland National Bank's Silver Spring branch who was active in professional and political organizations, died of cancer Sunday in Sibley Memorial Hospital.

She joined Maryland National Bank as a secretary in 1965, and had been assistant branch manager for the past five years.

Mrs. Novotny was president of the Silver Spring Business and Professional Women's Club for a time during the mid 1970s, and also served as editor of the Maryland Business and Professional Women's Club's magazine.

She was a member of the Democratic Club of Maryland, and had been a vice president o the Young Democrats of Montgomery County and then was president of the Women's Democratic Club of Silver Spring during the 1960s. She worked for passage of the Equal Rights Amendment.

She also belonged to the Chamber of Commerce and the Order of the Eastern Star's chapter No. 66 in Silver Spring.

Mrs. Novotny was a member of Woodside United Methodist Church in Silver Spring.

She was born in Lawrence, Kan., and came to Washington in 1937. She attended George Washington University and the Washington School for Secretaries.

Before joining Maryland National Bank, she had worked for three years as deputy of the old Rockville People's Court.

Survivors include a daughter, Carol Pruitt, of Columbia; two sons, Army Lt. Frank E. Novotny Jr., Of Germany, and John Novotny, of San Francisco; her mother, Florence P. Rivers, of Silver Spring, and one grandchild. CAPTION: Picture, EULA F. NOVOTNY