 He won assembly elections from the same constituency in 1998, 2003 and 2008 assembly elections by defeating Krishna Rakshit, Sankar Das & Dr. Bikash Roy respectively.In 2016, he is one of the six MLA from Indian National Congress who joined All India Trinamool Congress, due to various inconsistencies with the Indian National Congress allying with Communist Party of India (Marxist) in 2016 West Bengal Legislative Assembly election.On 19 December 2016, Barman stole silver mace belonging to the Speaker of the Legislative Assembly and ran off with it while INC and AITC MLAs were criticizing Forests Minister Naresh Jamatia over womanizing.