To provide a device which is not of a large scale and easily maintained because a mechanism for rotationally driving which is indispensable to conventional devices, that is, a motor, gears, etc. are unnecessary in a disk turner device for performing forging by pushing down an anvil from above while revolving a work placed on a disk by revolution of the disk.

The disk turner is formed with a base (2) and a rotary disk (1) having a plurality of pins (3) which are rotatably supported on the base and embeded in the radial direction with a certain interval on the periphery. This device is constituted so that the rotary disk is revolved by clamping a driving tool (5) for causing the revolution of the disk by engaging with the plurality of pins (3) in the horizontal direction and revolving it with a manipulator (4).