After films in Calcutta including Mayamrigo (1960) and Dui Bhai (1961), Biswajit relocated to Bombay. In 1962, he performed in the film Bees Saal Baad, which was followed by Kohraa, Bin Badal Barsat, Majboor, Kaise Kahoon and Paisa Ya Pyaar. His filmography includes Mere Sanam (1965), Shehnai, Aasra (1964), Night in London, Yeh Raat Phir Naa Aaygi (1966), April Fool (1964), Kismat (1968), Do Kaliyan (1968), Ishq Par Zor Nahin and Sharaarat (1972). He was usually paired with notable actresses such as Asha Parekh, Waheeda Rehman, Mumtaz, Mala Sinha and Rajshree.