Tharaasu is a 1984 Indian Tamil film, directed by Rajaganapathi and produced by G. Kanakasubbu. The film stars Sivaji Ganesan, K. R. Vijaya, Poornam Viswanathan and Prabhu in lead roles. The film had musical score by M S Viswanathan.
Prabhu is a rich industrialist who raises his father's illegitimate son after the death of its mother. His Father opposes this. Prabhu leaves home to live alone with the child.