To provide a parts feeder for improving the feeding efficiency of parts.

The parts feeder comprises a delivering mechanism for delivering cartridge memories 51, a feed truck 21 for feeding cartridge memories 51A out of the cartridge memories 51 delivered to a feed surface 21a by the delivering mechanism in such a vertical attitude that the longitudinal direction thereof is perpendicular or almost perpendicular to the feeding direction while sliding them on the feed surface 21a and eliminating cartridge memories 51A in other attitudes than the vertical attitude from the feed surface 21a, a sensor 23 for detecting whether the cartridge memories 51 in the vertical attitude is in a correct or reverse vertical direction, an air injection device 24 for injecting air from the side of the feed surface 21a to the parts in the vertical attitude, and a control part 25 for controlling the air injection device 24 to inject the air to cartridge memories 51B in the reverse direction when the sensor 23 detects the reverse direction.