A fume extractor hood (1) comprises a frame (2) configured to at least partially fit into a receptacle (100) formed in a ceiling (101); at least one lock member (9) located at one side (3a, 3b) of the frame (2), and comprising a deployable portion (10), adapted to be alternated between a deployed configuration in which it holds the frame (2) in the receptacle (100) and a retracted configuration in which it is entirely pulled back inside a perimeter of the frame (2) to allow the frame to be moved into and out of the receptacle (100), the lock member (9) comprises at least one elastic element (11) associated with the deployable portion (10) to bias it from the retracted configuration to the deployed configuration; the lock member (9) comprises a grip element (15) connected to the deployable portion (10) and arranged to be accessible when the frame (2) fits in the receptacle (100), the grip element (15) is adapted to be actuated to pull the deployable portion (10) back from the deployed configuration to the retracted configuration.