Sanjeev Chattopadhyay (Bengali: সঞ্জীব চট্ট্যোপাধ্যায়) (born February 28, 1936 in Kolkata, India) is a fiction writer.

Sanjeev Chattopadhyay is best known and read for his witty and humorous fiction. During the 1970s and 1980s, he was the most widely read Bengali author. His style is easily recognized by his use of short satirical sentences mixed with frequent English words and very lively language.

He studied chemistry at the Scottish Church College, Calcutta ^[1].

The plots of his fiction, set amidst Calcutta families, endeared him to the readers. Within the confines of these homes, he challenges the moral values of the fast-changing Calcutta middle class. Chattopadhyay frequently uses old men as his protagonists. These aged characters create the spiritual and philosophical edge found in his memorable novels Lotakambala (The Blanket and Quilt) and Shakha Prasakha (Branches). His most famous novella Svetapatharera tebila (The Ivory Table) is an example of his characteristic style of story-telling which mixes tension, dilemma, curiosity, pity, humor, and satire. He has written fiction for children and continues to write for magazines and newspapers.

The U.S. Library of Congress has 43 titles by him.

Chattopadhyay is the recipient of many awards including the Ananda Puraskar in 1981.