PURPOSE: To obtain a large utilization factor of space and to promote the miniaturization, by rotating a swivel lever enabling a rotary angle of a sprocket to be selectively set to a large or small degree.

CONSTITUTION: In accordance with a swivel lever 2, if it is turned in a direction A, a gear 31 rotates in the direction A, and a device, which rotates a gear 32 meshed with the gear 31 in a direction B and a gear 30 in a direction C turning a gear 32 meshed with the gear 30 in a direction D, rotates a sprocket 6 in the direction D similarly to the gear 32 to feed a parts-storage tape 13 in a direction E by a distance of storage space of one electronic part 14. If the swivel lever, 2 is returned in the counterclockwise direction by a coil spring 8, the device, in which also the gear 31 rotates in the counterclockwise direction, rotates the gear 29, meshed with the gear 31, and the gear 30 in the clockwise direction while a lever 20 and a stopper piece 18 in the counterclockwise direction against the resilience of a torsional spring 19, and the stopper piece 18 engages with a predetermined tooth of a ratchet gear 17 which is being unable to turn in the counterclockwise direction by a one-way clutch 5.