Naangu Suvargal (Four Walls) is a 1971 Indian Tamil-language film directed by K. Balachander, who also wrote the story and dialogue.
The movie features actors Jaishankar, Ravichandran, Vanisri, Nagesh, Srividya, Vijaya Lalitha, and V. S. Sharma as a producer alongside P. S. Mani in another production role.
It was Balachander's first venture into colour film and marked the second collaboration between lead actors Ravichandran and Jaishankar.
Srividya portrayed a character who was visually impaired, requiring her to wear contact lenses for authenticity.
The soundtrack is composed by M. S. Viswanathan with lyrics penned by Kannadasan.
Released on February 6, 1971, the film was not successful commercially upon its release.