PURPOSE: To smoothen the flow of resin at the time of forming a cabinet and to make the cabinet thin without spoiling the beauty by slanting a part of the side of a wall type cabinet made of resin hung on the wall on its back, to the back.

CONSTITUTION: The body 1 of a speaker cabinet is formed in a body of thermoplastic resin, and a slanted part 1b that slants inward to the back of the cabinet is formed. An opening 1c is formed near the corner of the slanted part 1b, and a signal terminal plate 2 is fixed to the opening 1c by a sealing member 2a. A longitudinal rib 1d is formed in the longitudinal direction of inside of the body 1 to make piping and warping in appearance small and the body 1 is made thin. A baffle board 3, a grill board 7, a net member 9 and a vibration-proof plate 10 etc. are attached to the body 1. Then, the back of the body 1 is hung on a wall, and its external appearance is made beautiful and the thickness is made small.