PURPOSE: To provide the titled apparatus capable of peeling the skin of an onion without fail, and having simple construction composed of the transferring means to transfer the onions one by one, the incising means to apply a circular incision to the skin at the top of the onion, and the blasting means to blast compressed air toward said incision.

CONSTITUTION: The onion On is placed on the receiving cylinder 6 on the base plate spanned between the chain links 4, 4 of the first transfer conveyor 1. The conveyor 1 is driven until the onion On reaches under the incision device X, when the conveyor 1 is stopped temporarily. The incision cylinder 17 is lowered to press the onion On, and rotated with the rack 12 and the pinion 13 keeping the above state. A circular horizontal incision C is applied only to the skin of the top of the onion with the incision edge by this process. The conveyor 1 is restarted to transfer the onion On under the skinning device Y, the peeling cylinder 21 is lowered, compressed air is blasted from the blasting hose 23, and at the same time, the peeling cylinder 21 is rotated reciprocatively by about 180°. The skin is peeled and removed by this process. Finally, the onion On is transferred to the second transfer conveyor 3, and the remaining skin is removed.