PURPOSE: To miniaturize a slide adjusting device for a forging press and to simplify the working.

CONSTITUTION: A receiving part 32A is provided in an adjusting lever 3, and a nut 5A being fit into inside provides a rotary shaft 52A parallel to the axis. A attaching hole 34A piercing through both side surfaces of the receiving part is drilled, a circular plate 4 having an eccentric through hole 41 is fit in the inside and both rotary shafts of the nut is fit in this hole. The nut has a female screw piercing through the axial direction at a right angle, and one end of the screw 7 engaging with this is connected with a motor attached to the slide 2. Then, the height variation of the circular arc motion at the time that the correcting lever is moved with inclining by making the center Q2 of a wrist pin 6 as the fulcrum is reacted with the rotation of the circular plate and the rotary shaft. Therefore, the movement of each part for the slide correction is all rotation slide movement, and the concentration of the stress is relaxed, and the miniaturizing can be realized.