To provide a part supplying device agitating parts such as headed parts and flanged parts of all shapes by an agitation means, arraying them on a conveyance rail and supplying the parts to a screw fastening machine or the like.

The part supplying device comprises the conveyance rail 5 having a guide groove 5C for suspending and guiding the parts, and the agitation means 9 enclosing a rear part of the conveyance rail 5, dropping and supplying the agitated parts to it, and the conveyance rail 5 is characterized in that two side walls 5A, 5B extending in parallel to each other are opposed at a predetermined interval to form the guide groove 5C, the side walls 5A, 5B are integrally formed on the surfaces of rear parts with chevron parts 10A, 10B of a triangular sectional shape extending in the same direction with the conveyance rail 5 and guide slopes 11a, 11b are provided to incline from final ends of tops of the chevron parts 10A, 10B to an upper surface of the conveyance rail 5.