Abstract: A component supply device is a feeder which uses a supply tape to supply an electronic component, and includes a main carrier route for carrying the supply tape to a component suction position, a first carrier route for carrying the supply tape from a tape insertion position to a rear end part of the main carrier route, a second carrier route provided so as to be aligned below the first carrier route, a second sprocket which carries the supply tape to the component suction position, a third sprocket which carries the supply tape from the tape insertion position to the second sprocket, and a route switching device provided to a loading unit which automatically changes a carrier route of the supply tape from the first carrier route to the second carrier route when the supply tape is carried to the component suction position.