Gnana Oli is a 1972 Tamil-language Crime motion picture written by Vietnam Veedu Sundaram and directed by P. Madhavan and produced by P. K. V. Sankaran and Aarumugam under the banner of Jayaar Movies. An Orphan struck by poverty works hard to make a living for his daughter. He accidentally kills a person . He leaves his daughter and village behind, and returns after a very long time as a rich businessman with a different identity. He is faced with a dilemma whether or not he will disclose his identity to protect the dignity of his daughter. Gnana oli features Sivaji Ganesan, Saratha, Vijayanirmala, Major Sundarrajan, Srikanth, V. K. Ramasamy and Vijaya Nirmala. The music was composed by M. S. Viswanathan. Cinematography was done by P. N. Sundaram and editing by R. Devarajan. The motion picture has a running time of 151 mins. It was released on 5th April 1972. Distribution rights for the movie were acquired by Jayaar Movies.