PURPOSE: To continuously perform double-side printing by reversing printing paper having an image transferred thereto in a feed process to oppose the same to the printing process part used in the image transfer of one surface, the printing process part excepting an electrophotographic process part or the image transfer part of the electrophotographic process part.

CONSTITUTION: A printer is equipped with a screen printing process part and an electrophotographic process part and, in the screen printing machine 1 of the screen printing process part, an image reading part 100 is arranged to the upper part thereof and a plate making part 10 is arranged above a reversibly rotatable plate cylinder 2 in opposed relation to a plate discharge part 30. The electrophotographic process part arranged under the printing process part is constituted by providing a charger 51, a writer 52, a developing part 53 and a transfer and feed device 54 around a photosensitive drum 50. A printing paper feed part 90 equipped with the reversal passage 90C folded back in the direction reversing the surface of the printing paper S discharged from a fixing device 80 with respect to a feed passage 90B is arranged between the screen printing process part and the electrophotographic process part.