Les chapeaux noirs, album in the Belgian comic series Spirou et Fantasio, released in 1952. The album contains the longer story Les chapeaux noirs written and drawn by Franquin, and three shorter stories, Mystère à la frontière by Franquin, and Comme une mouche au plafond and Spirou et les hommes-grenouilles by Jijé. All the stories were previously serialised in the Franco-Belgian comics magazine Spirou between 1949-50.