Mosha is a work of science fiction written in Bengali by the novelist Premendra Mitra. The story was first published by Deb Sahitya Kutir, Kolkata, West Bengal, India, in the Puja Annual titled Alpana in 1945. Ghanashyam Das alias GhanaDa, the fictional character and the protagonist of the GhanaDa series of science-fiction stories appeared for the first time in this novel.