[3][4] Roy came from a Bengali Baidya family having its root in Mahilara, Barisal District (of the present Bangladesh).
It is here where Jahar Roy completed his studies and started working on odd jobs such as proof reader, medical representative and finally a tailor.
At the end of his career, when he was ailing, he did a cameo in Ritwik Ghatak's autobiographical film Jukti Takko Aar Gappo.
A lifelong associate of Rang Mahal theatre in Kolkata, his performances in plays such as Adarsha Hindu Hotel, Ulka, Subarnagolak, and Anartha are still celebrated.
[5] Known for his wit and adeptness in physical comedy, Jahor Roy also composed several skits, including Nyapasur Badh, Function theke shashan, and many others.