Abstract: In an automobile assembly line wherein a car body is hung and conveyed by a hanger; an apparatus for aid in attaching a wheel in which the wheel is set on a pair of wheel supporting structures (12, 12) at a wheel placement position, a base plate (10) is held in a balanced state by an air cylinder (16) interposed between a pole (8) and a vertical motion unit (9), the base plate (10) supporting the wheel is approximated to a wheel attachment position in the car body (1) while being synchronously moved by a synchronous motion unit (5), and the wheel is moved horizontally and vertically by turning an annular handle (15) with its balanced state kept by the air cylinder (16), thereby to effect the positioning between the wheel and a hub on the car body (1), so that an operator need not directly lift up the wheel.

Abstract: In attaching a work to a car body, the work (W) set on a work support unit (9) is positioned relative to the car body (1) in such a way that positioning pins (10) erected on a jig (8) are inserted into gauge holes (1a) formed in a lower surface of the car body (1), whereby an operator can attach the work (W) without carrying it up.