To provide a single process perfecting printing device, which uses a block processed master capable of obtaining excellent printed matters, even if an original corresponding to a front image and an original corresponding to a rear image are different with each other.

The perfecting printing device has a printing part 2 having a plate cylinder 11 and a pressing means 12, a first plate making image 14A having a thermal head 32 for perforating a master 21 and corresponding to the front surface image, and a plate making part 3 for making the block processed master 14 having a second plate making image 14B corresponding to the rear surface image, wherein a rear surface printing process for printing the rear surface image on one surface of a sheet is performed, after a front surface printing process for printing the front surface image on the other surface of the sheet P is performed. The perfecting printing device is provided with a plate making mode setting means 28 for setting a plate making mode corresponding to an original image, wherein the plate making mode setting means 28 can individually set the plate making mode with the first plate making image 14A and the second plate making image 14B.