Bhuvana Oru Kelvi Kuri (transl. Bhuvana is a question mark) is a 1977 Indian Tamil-language drama film directed by S. P. Muthuraman and written by Panchu Arunachalam. It is based on the novel of the same name by Maharishi. The film stars Sivakumar, Rajinikanth and Sumithra. It focuses on two friends with conflicting characters and their conflicting lives.

Bhuvana Oru Kelvi Kuri was notable for casting Rajinikanth and Sivakumar as a hero and antihero respectively, contrary to the roles they played in earlier films. It was released on 9 September 1977. The film shocked audiences who were used to seeing Rajinikanth and Sivakumar in their usual roles; nevertheless, it was a commercial success, and won two Filmfare Awards: Best Tamil Film and Best Tamil Director for Muthuraman. The success of Bhuvana Oru Kelvi Kuri led to Rajinikanth playing more positive roles in films.