PURPOSE: To reduce the space held by a discharge tray by providing a vertical tray for a large-sized paper besides a horizontal tray for storing a small-sized paper in a device such as an electrophotographic copier or the like which can make a copy in a large size.

CONSTITUTION: At a copy discharge part of an image forming device 1, a horizontal tray 9 and a vertical tray 10 are arranged through a switch gate 5 so that a small-sized paper is guided toward the horizontal tray and a large-sized paper is guided toward the vertical tray. An opening is formed on the side of the vertical tray 10 so that the large-sized paper is easily taken out of the side. Also, an opening 16 is provided toward a front panel of the tray 10 so that the stored paper is moved toward the side opening by an operator and the paper can be easily taken out.