PURPOSE: To facilitate taking out the long and short sheets by arranging a tray in swingable manners by a rotary shaft on a top surface and setting the rotary shaft in sliding in guide grooves formed on the both sides of the top surface.

CONSTITUTION: Each guide groove 13 in which a discharge tray 2 is slidingly moved is formed on the both sides of a cut part 1b formed on a top surface 1a, and an insertion port 14 is formed in the intermediate part. The discharge tray 2 for closing the cut part 1b is installed onto the top surface 1a, and a rotary shaft 21 and a positioning pin 22, keeping a prescribed interval, are formed integrally on the both sides at one edge of the discharge tray 2. The rotary shaft 21 and the pin 22 are engaged with the guide groove through the insertion port 14, and moved slidingly, and then the cut part 1b is closed. When the pin 22 is released from the guide groove 13, and the tray 2 is turned around the rotary shaft 21, a placing tray for a long sheet is formed, and when the tray is slidingly moved rearward in the closed state, a discharge port 12 is opened, and a short sheet is placed onto an inclined surface 11.