To provide a printing device which is capable of performing plate making operation on a plate cylinder which is not used for printing, parallelly.

A gear 10G is mounted on one of the ends of a rotary shaft 21 for a plate cylinder 10 and a pulley 24 is mounted on the other end. The gear 10G is driven to rotate by a printing drive part through a gear installed on another plate cylinder. This drive is transmitted to the other plate cylinder of the printing device, so that the respective cylinders including the plate cylinder 10 can be rotated synchronously. The pulley 24 is structurally rotated by a motor 25 through a belt 29 and a pulley 28. The gear 10G is connected to the rotary shaft 21 through a clutch 32 and both can be disconnected from each other. The pulley 28 is connected to the rotary shaft 26 of the motor 25 by a clutch 27 and both can be disconnected from each other.