PURPOSE: To print another printing paper in succession to the present printing paper when printing of said present printing paper is finished or interrupted, by setting the printing papers to a plurality of feed tractors separately and arranging the feeding direction of the printing papers to be switchable by a driving gear.

CONSTITUTION: A printing paper 1 is driven by a feed tractor gear 8 in response to the movement of a driving gear 10 and directed to the contacting point of feed rollers 3, 4 by a feed tractor 2 driven by a motor. Then, the printing paper is supplied to a printing device 5 via the feed rollers, where the printing paper is printed. Once the printing paper 1 is printed, the driving gear 10 which is driven by a motor is actuated to move the feed tractor gears 8 and 9 which are simultaneously meshed with the driving gear 10. Accordingly, the feeding direction of the feed tractors 2, 7 is changed. The feed tractor 7 is directed to the contacting point of the feed rollers 3, 4. Subsequently, an end of a printing paper 6 which is kept waiting over the feed tractor 7 is supplied to the printing device 5 via the feed rollers 3, 4.