Abstract: This invention relates to a sorter for sequentially moving a plurality of vertically stacked storage sections to a sheet reception position by a moving mechanism which is pivoted upon reception of a rotational force from a drive, and for automatically sorting sheets discharged from an image forming apparatus into the storage sections. The moving mechanism is constituted by a link body, pivotal movement of the link member allows widening of a distance betwen two adjacent storage sections, and the plurality of storage sections connected by the corresponding regulating members can be moved to the sheet reception position, thereby making the sorter compact and achieving appropriate sorting without causing jam or the like.