To realize the high efficiency and long life of an air blower, and facilitate the cleaning of a vane body.

A cylindrical body 4, having a circular cross section, is rotatably supported via a bearing 12, on the inner side of a housing 8. A cylindrical body 14, on which a cage type coil is formed, is closely mounted, for forming a three-phase induction motor, on the outer peripheral surface of the cylindrical body 4. A rotation piece 6 is formed of the cylindrical bodies 14 and 4. Many laminated iron cores 16 are arranged, at constant intervals in the peripheral direction of the cylindrical body 14, on the inner side of the housing 8, with a given gap formed with the surface of the cylindrical body 14 between. Coils 20 are wound on the respective laminated iron cores 16. Fixing pieces 10 are formed of these laminated iron cores and coils. Frame bodies 28, having vane bodies 24, are detachably fitted to the inner side of the cylindrical body 4, by a click mechanism 30.