The Man Who Mistook His Wife for a Hat and Other Clinical Tales is a 1985 non-fiction book by neurologist Oliver Sacks describing the case histories of some of his patients.

Sacks chose the title of the book from the case study of one of his patients who has visual agnosia,[1] a neurological condition that leaves him unable to recognize faces and objects.

The book comprises twenty-four essays split into four sections ("Losses", "Excesses", "Transports", and "The World of the Simple"), each dealing with a particular aspect of brain function.

Peter Brook adapted Sacks's book into an acclaimed theatrical production, L'Homme Qui..., which premiered at the Théâtre des Bouffes du Nord, Paris, in 1993.

An Indian theatre company performed a play entitled The Blue Mug, based on the book, starring Rajat Kapoor, Konkona Sen Sharma, Ranvir Shorey, and Vinay Pathak.