To eliminate nonuniformity in an image density, an image density difference or the like which occurs between a printing image for the surface and a printing image for the rear, as the amount of transfer of ink transferred from the outer peripheral surface of a plate cylinder onto the outer peripheral surface of a transfer cylinder becomes smaller than that of the ink transferred directly from the outer peripheral surface of the plate cylinder onto printing paper, in stencil printing equipment of a one-pass double-side printing system using one plate cylinder and a divided transfer cylinder.

Based on output signals from a double-side printing set key 143 and a plate making start key 141 of an operation panel 140, a control device 90 selects, from a ROM 92, the relational data for forming a non-plate-making area length L25 corresponding to a pressing force changeover time required for changing a pressing force of the transfer cylinder 9 against the plate cylinder 1, between a plate making image area 24 for the rear and a plate making image area 23 for the surface along the direction A of rotation of the plate cylinder 1 in a master 22 already subjected to plate making. It controls a thermal head 26 through the intermediary of a thermal head driving circuit 26A and controls a master carrying motor 30 through the intermediary of a master carrying motor driving circuit 30A.