Karutha Kai (; metaphor for "guilty") is a 1964 Indian Malayalam-language film, directed by M. Krishnan Nair and produced by P. Subramaniam. The film stars Prem Nazir, Sheela, Adoor Bhasi and Thikkurissy Sukumaran Nair. It was released on 14 August 1964. The film was remade in Telugu as Loguttu Perumallakeruka.
The music was composed by M. S. Baburaj and the lyrics were written by Thirunayinaarkurichi Madhavan Nair.