Oru Kai Osai
| Oru Kai Osai | |
|---|---|
VCD cover  | |
| Directed by | K. Bhagyaraj | 
| Written by | K. Bhagyaraj | 
| Produced by | K. Bhagyaraj | 
| Starring | K. Bhagyaraj Ashwini  | 
| Cinematography | B. S. Pasavaraj | 
| Edited by | R. Bhaskaran | 
| Music by | M. S. Viswanathan | 
Production company  | Ammulu Productions  | 
Release date  | 
  | 
Running time  | 140 minutes | 
| Country | India | 
| Language | Tamil | 
Oru Kai Osai (transl. The sound of one hand) is a 1980 Indian Tamil-language film, written, produced and directed by K. Bhagyaraj, starring himself and Ashwini. It was released on 25 July 1980. The film created an impact and was well received by the audience for its unique characterisation and unexpected climax. It was remade in Telugu as Pranaya Geetham (1981).