Paul M. Kain, 75, the orchestra leader at the old Wardman Park Hotel from 1938 until about 1955 and a well-known figure on the Washington music scene for many years died Monday at Capitol Hill Hospital. He had undergone surfgery for cancer.

Mr. Kain was born in Huntington, Ind., and grew up in that state. He began playing the saxophone in high school and also played clarinet flute and oboe.

He began his professional career playing with orchestras in the Midwest, In 1929 he formed his own band and went to California where he played in a number of leading ballrooms. The orchestra also traveled widely.

Mr. Kain first came to Washington in 1937 to play an engagement at the Wardman Park. He came back the next year and was leader of the hotel's permanent orchestra until about 1955. After that he led small groups that played at nightclubs and social events in the area until 1973 when he retired and moved to Carson City Nev.

During the 1940s Mr. Kain also led the band at the old Glen Echo Amusement Park. At the same time he was staff conductor for the orchestra of the Washington outlet of the Columbia Broadcasing System.

Mr. Kain, who had returned here for surgery in connection with his illness, was a life member of the Washington and Los Angeles locals of the American Federation of Musicians.

Survivors include his wife, Agnes, of Carson City.