Achintya Kumar Sengupta (born 19 September 1903 – 29 January 1976) was an Indian Bengali-language poet, story writer, novelist, biographer and editor. He was born in Noakhali, now in Bangladesh. At the age of 13, after his father's death, Sengupta moved to Calcutta, where he completed his schooling. He got a B. A. Honours degree from South Suburban College in English, followed by an M. A. degree from the University of Calcutta. Subsequently, he obtained a degree in Law and entered the judicial service in 1928 as a Civil Judge (Junior Division) and Assistant Magistrate Second Class. He served as a Judge in Magistrate Courts of Kolkata and District Courts of Midnapore, Dinajpore, and Kushtia. He retired as a Principal District Judge of the Alipore Court in 1961. He started writing under a pen name, ‘Niharika Debi’. He contributed to almost all genres of Bengali literature, but is best remembered for his novels and short stories. In all, he wrote more than 100 books. Sengupta was closely associated with the famous magazine Kallol, and was its editor for some time.