An extractor hood (1) with a body (2) which is hollow in its interior (at 15), provided with a lateral opening (8) and containing in its cavity (15) a fan (16) which can aspirate from the lateral opening (8) fumes and/or vapors generated by an underlying hob of a kitchen, the body (2) having opposite surfaces (5, 6) with a larger area, connected by walls or surfaces (10, 11, 12, 13) with a smaller area, a first one (5) of the surfaces (5, 6) with the larger area being placed on a vertical wall (2) of said kitchen, the second surface (6) with the larger area containing the aforementioned lateral opening (8), and in front of this opening (8) there being a flat panel (23) placed spaced from this second larger surface. This flat panel (23) is parallel to the second surface (6), including when the hood (1) is in use.