To issue a plurality of mediums, which are varied in sort, in the integrally bound condition by arranging a movable butting member to which a medium collides in front of a discharge port, a stacking means stacking the second medium and the following mediums on the back face side of the first medium in the conveyance order, and binding means binding the stacked mediums together.

The first medium collides against a butting member 41 so as to be stopped. Then, a pushing-up member 48, which is moved in the arrow B direction when a solenoid 57 is turned on so as to suck a link 58, pushes the rear end of the first medium upward. Under this these conditions, the conveyed second medium collides against the pushing-up member 48. When the second medium collides against the pushing-up member 48, the pushing-up member 48 is moved in the arrow B' direction, and the second medium is slid in beneath the first medium by means of the drive of a conveying belt 47 so as to collide against the butting member 41 and stopped. In this way, all the issued mediums are piled up on the conveying belt 47 in the conveyance order, and then, their binding parts are bound together by means of a stapler 43.