AIR INTAKE CONTROL DEVICE FOR ENGINE

In an air intake control device for an engine, a throttle body (1) includes a drum portion (1a) and a flange portion (1b) protruding from an outer periphery of one end portion of the drum portion (1a) and having an end surface in an substantially square form; first and second fastening bosses (2, 2') are integrally formed respectively at corner portions of the flange portion (1b), the corner portions being positioned respectively at diagonal positions of the flange portion (1b); first and second bearing bosses (9, 9') supporting a valve stem (8a) of a throttle valve (8) are formed over the flange portion (1b) and the drum portion (1a); one of a full-closing-stopper boss (20) and a stay boss (15), which are positioned so as to interpose the first bearing boss (9), is continuously provided to the first fastening boss (2) in the flange portion (1b), while the other is formed in the flange portion (1b); a stopper bolt (21) for restricting a full-closing position of the throttle valve (8) is screwed to the full-closing-stopper boss (20); and a screw (16) fixing a guide tube stay (13) supporting a guide tube (12) of an operation wire (11) is screwed to the stay boss (15). With this configuration, reduction in size of the throttle body is possible.