Manavudu Danavudu is a 1972 Indian Telugu-language film directed by P. Chandrasekhara Reddy. The film stars Sobhan Babu, Sarada and Krishna Kumari. It was produced by P. Chinnapa Reddy of Ushasri Films.

Sobhan Babu played a dual role as Doctor Venu during the daytime and as Killer Jagan during the nighttime. The film was remade in Hindi by Doondi as Adha Din Adhi Raat (1977) and in Tamil as Engal Thanga Raja (1973) and in Malayalam as Ithaanente Vazhi (1978).