PURPOSE: To eliminate non-forged part by providing at least two sets of the holding parts to hold a work in the axial line direction so as to make the holding position of a work changeable.

CONSTITUTION: The switching of the tong levers 4, 4 of the inner side is performed by pushing and pulling a rod 5 with the operation of switching cylinder 7 and the switching of the tong levers 11, 11 of the outer side is performed by the operation of switching cylinders 12, 12. The rotation of the inner side tong levers 4, 4 and outer side tong levers 11, 11 is obtd. by selecting the position of a slide clutch mechanism 21 and by transmitting the rotary force of a motor 17 from a pinion 19 to the inner cylinder 1 via gear 5 or by transmitting to the outer cylinder 8 via gear 16 from the pinion 20. Therefore, after performing the forging by undertaking the holding of a work 25 by the inner side tong levers 4, 4 the inner side tong levers 4, 4 are opened by undertaking the hold by the outer side tong levers 11, 11, then the forging of the part held by the inner side tong levers 4, 4 becomes possible and unforged parts are eliminated.