The configuration comprises a carrier equipping an ejection plate on the front for ejecting the bundled-paper sheet material P and equipping a plurality of cutout parts, which are open in their top parts, at a predetermined interval on both the left and right sides; and a drive transmission unit being equipped by a plurality of drive rollers, each of which comprises a plurality of bosses in a predetermined interval on a single circumference around the rotation center thereof, in a predetermined interval on both the left and right sides of the bundled-paper sheet material transport path, wherein a drive force is transmitted by allowing bosses of each drive roller, which rotates by receiving a drive force from a drive source, engage in the respective cutout parts of the carrier sequentially, thereby allowing the carrier travel in the front and back directions of the bundle transport path.