Chinnanchiru Ulagam is a 1966 Indian Tamil-language comedy film directed by K. S. Gopalakrishnan and produced under Chitra Productions. The film stars Gemini Ganesan, K. R. Vijaya, Nagesh, Magic Radhika, and V. K. Ramasamy.
The movie is based on the Subbu Arumugam novel Manithanai Kaanom (Mankind is missing). It was released on September 2, 1966, and became a commercial success.
The film's screenplay was written by Gopalakrishnan, with Arumugam contributing to the comedy subplot. Cinematography was handled by R. Sampath, and editing by R. Devarajan. The final length of the film is 4,784 metres (15,696 ft).
The soundtrack was composed by an unknown composer.