This biographical article needs more biographical information on the subject.Statistical information, such as date and place of birth, information on historical significance, and information on accomplishments is desired. Please remove this message when done. See this article's talk page for more information.(August 2014)
Later he became a Marxist and joined the Indian Communist Party.He was one of the seven members of an inner committee set up by the Indian Communist Party Politburo. He also had important role during the inner-party struggle of this communist party.He was elected as a member of Legislative Assembly of West Bengal in 1952 election. After the split in the Indian Communist Party, Niranjan remained with the Communist Party of India (Marxist) (CPI(M)). He also led the coalition ministry of West Bangla in 1967-71.