While an output tray is housed in the printer body, a tray support supports the output tray in such a manner that has the output tray lifted off a surface on which the printer is placed. In the process of pulling out the output tray from the printer body, the tray support supports the output tray in such a manner that the rear end portion of the output tray gradually comes near to the surface on which the printer is placed, and guides the output tray so that a rib, which is formed on the front end portion of the output tray, and the rear end portion of the output tray are in contact with the surface on which the printer is placed when the output tray has been completely pulled out. The output tray is supported on the two portions, i.e., on the rib and rear end portion thereof, when it has been completely pulled out. Accordingly, it can be protected from bending due to the weight of paper sheets stacked thereon so as to prevent spillage of the paper sheets from the output tray even when the stacked paper sheets are large in quantity.