Four Walls)[1] is a 1971 Indian Tamil-language film written and directed by K. Balachander.

Naangu Suvargal was directed by K. Balachander who also wrote the story and dialogue.

It was produced by V. S. Sharma and P. S. Mani under Screen Entertainment,[2] and was Balachander's first colour venture,[3] as well the second collaboration between Jaishankar and Ravichandran as actors.

[4] Srividya portrayed a visually impaired character for which she had to wear contact lenses.

[4] T. G. Vaidyanathan of Film World described it as a "re-do" of V. Shantaram's Do Aankhen Barah Haath (1957) as it dealt with rehabilitation of criminals.