PURPOSE: To take out a necessary part only, by extracting the necessary part and a drawer which stores it based on the specification information of the body to be assembled, and drawing out the pertinent drawer based on the signal thereof.

CONSTITUTION: When a truck is approached to a part assembly position, a specification information reading means 21 outputs the data signal of the part corresponding to the machine kind to an outputee selection means 25 with the signal by the machine kind transmitted from a host computer CPU being delivered to a data collating means 23 via a data converting means 22 by a confirming signal transmitted from a truck approach confirming sensor S1 moreover outputting a selection signal to a driving circuit via a signal output means 27 with a drawer 6 which stores the pertinent part being extracted from the data stored in an outputee memory means 26. In the driving circuit, an indication lamp 13 which indicates the pertinent drawer 6 based on the confirmation signals from this selection signal and truck approach confirming sensor S1 is lit, a pertinent switch valve 18 is changed over to one part as well, and the drawer is extruded by a driving cylinder.