To reduce generation of image deviation or double printing by reducing deviation of conveying timing of a printing paper sheet to be conveyed from an upstream printing part to a downstream printing part and deviation of the printing paper sheet.

An intermediate conveying device 21 for conveying a printing paper sheet 22 which has passed through a printing part 18 to a printing part 19 is arranged between printing parts 18, 19 respectively constituted between plate cylinders arranged in parallel in the paper sheet conveying direction X and printing pressure members 2A, 2B provided on respective plate cylinders so as to be approached to and separated from each other, the first outer peripheral surface 26a out of a first roller 26 near the printing part 18 on which a conveying belt 28 of the intermediate conveying device 21 is laid and a second roller 27 near the printing part 19 is formed into the approximately same size over the whole range in the roller shaft direction Y, and the contact area of the conveying belt 28 and the printing paper sheet 22 on the first roller 26 is increased.