The present invention provides a kind of component feeder that enhances the utility of a component feeder that sequentially feeds components using a taped component at a predetermined supply position.The component feeder includes an air blowing mechanism (216) for removing deposits, and confirms whether or not the optical sensor (166) is used to confirm whether the component (P) is conveyed to the component supply section (SS) in an appropriate state. The compressed matter is blown by removing deposits that affect the detection accuracy of the optical sensor (166). By blowing air, deposits that affect the detection accuracy of the optical sensor (166) can be removed. Therefore, erroneous determination of the optical sensor (166) can be reduced.