Achamillai Achamillai (transl. No fear, no fear) is a 1984 Indian Tamil-language political drama film written and directed by K. Balachander. It stars Rajesh and Saritha, with Pavithra, Jeyagopi, Delhi Ganesh, Charle and Delhi Nayakar in supporting roles. It revolves around a selfless idealist whose morality declines when he takes to politics, alienating his wife in the process.

Achamillai Achamillai was released on 18 May 1984 and received critical acclaim. It won three awards at the 32nd Filmfare Awards South, as well as the National Film Award for Best Feature Film in Tamil. The film's title refers to a poem written by Subramania Bharati.