To improve accessibility to the inside of a printing unit and properties for maintenance thereof, without restricting the functionality of a printing press, in regard to the printing press wherein a device for making a plate is incorporated.

An image forming head 7 is fixed to an adjustable support member 8. Means for fixing the support member 8 are provided at least at two different positions in respect to a plate cylinder 4. At a first position, the image forming head 7 is set in a state of being directed to the plate cylinder 4 at an image forming position, while at a second position, it is set in a state of being apart from the plate cylinder 4 and, consequently, the plate cylinder 4 is accessible from outside.