Merciful Heart) is a 1978 Tamil-language film written by Jayakanthan and directed by A. Bhimsingh.

It is based on Jayakanthan's novel Karunaiyinal Alla (transl.

Her old lover comes in search of her and asks her to marry him as his ailing wife is dying.

She refuses but decides to marry Mudaliar, to fill the gap, she feels in her life.

Karunai Ullam was produced by M. S. V. Movies,[1] and was the last film directed by A. Bhimsingh to release.