PURPOSE: To permit parts to be repeatedly built in a predetermined position, by pressing the parts to be successively advanced to a work in the direction of its predetermined position and changing an attitude of the parts in the point end of a magazine subsequently extruding the parts to be adapted to the predetermined position of the work.

CONSTITUTION: A magazine 4 is integrally mounted to a hand of a robot through a frame 7. While if parts 1 are fed moving their base parallelly with a guide rail 5 of the magazine 4, an arm of the guide rail 4, which freely turns to the front against a spring, permits the parts 1 to be pressed in. If the arm is charged with a preset number of the parts 1, the final part is set by stopper action of the arm, and the magazine 4 finishes its charging set of the parts 1. And the robot feeds the parts 1 to be built and set in a mounting hole in a predetermined position 53 of a work 52. Further an attitude of the parts 1 is changed by an attitude changer 31.