Arnold Kasuk (February 25, 1908 Tartu – October 7, 1992 Tartu) was an Estonian musician and actor.

In 1923, he graduated from the 15th elementary school in Tartu. In the years 1920–1923, he studied violin at Tartu High School of Music. From 1935 to 1939, Vanemuine was a choir singer and played the violin in the summer orchestra.

From 1939, he was a drama actor in Vanemuise. He also played in operettas and ballets and performed roles in plays ("Anna Karenina", 1953, "Tabamata ime", 1954, "Niccolo Paganini", 1960, "Kaugel kodusadamast", 1962).