PURPOSE: To allow even warped sheets to slide closely on a guide and to be kicked out stably onto inlet rollers by providing, in each belt supporting body, a circumferentially traveling belt which can travel round and has projected kick-out claws on its surface which catch the end portion of a sheet.

CONSTITUTION: While a belt 3 turns round, each kick-out claw 31 on the belt 3 catches the rear end of the lowest sheet S of sheets S stacked between a stationary ruler plate 4 and a movable ruler plate 41, and kicks out the sheet S. The kick-out claw 31 makes contact with the rear end of the sheet S and kick out the sheet S, while the whole surface of the sheet S is attracted by a suction case whose upper surface is open so that the whole surface of the sheet keeps close contact with a guide. Consequently, the rear end of the sheet S is never left behind the kick-out claw 31 and the sheets S are kicked out continuously one after another at each time when the kick-out claw 31 on the belt 3 catches a sheet.