Bengali science fiction is a part of Bengali literature containing science fiction elements. It is called Kalpabigyan or stories of imaginative science, in Bengali literature. The term was first coined by Adrish Bardhan during his editorship years.

Bengali literature denotes the body of writings in the Bengali language and which covers Old Bengali, Middle- Bengali and Modern Bengali with the changes through the passage of time and dynastic patronization or non-patronization. Bengali has developed over the course of roughly 1,300 years. If the emergence of the Bengali literature supposes to date back to roughly 650 AD, the development of Bengali literature claims to be 1600 years old. The earliest extant work in Bengali literature is the Charyapada, a collection of Buddhist mystic songs in Old Bengali dating back to the 10th and 11th centuries. The timeline of Bengali literature is divided into three periods: ancient (650–1200), medieval (1200–1800) and modern. Medieval Bengali literature consists of various poetic genres, including Hindu religious scriptures, Islamic epics, Vaishnava texts, translations of Arabic, Persian and Sanskrit texts, and secular texts by Muslim poets. Novels were introduced in the mid-19th century. Nobel laureate Rabindranath Tagore is the best known figure of Bengali literature to the world. Kazi Nazrul Islam, notable for his activism and anti-British literature, was described as the Rebel Poet and is now recognised as the National poet of Bangladesh.