To provide a press machine which can improve position control accuracy by reducing backlash, and is also excellent in durability of a deceleration part.

The deceleration part 16 comprises: a deceleration part body 18 fixed to a frame body 11; a pin tooth 19 provided on the inner periphery of the decelerating part body 18; an external tooth gear 20, which meshes with the pin tooth 19 and a tooth shape of which corresponds to the pin tooth 19; a crankshaft 21 having eccentric parts 21a, 21b rotating in a state of being eccentric and rocking the external tooth gear 20; a support 22 to which a rotation of the external tooth gear 20 is transmitted to be rotated together with the external tooth gear 20; and an output shaft 23 connected to the support 22. The output shaft 23 is fixed to the spindle 12, so that a rotation of a motor 17 is transmitted to the crankshaft 21.