The paper feeding cassette includes a push-up plate provided inside the cassette for receiving a stack of sheets entirely thereon regardless of the size of the sheets. On the push-up plate is mounted a trailing edge plate which is coupled to a fixing plate through a slide groove and which is configured to be capable of sliding in a sheet feeding direction in which the stacked sheets are to be fed to restrict the position of the stack of the sheets in the sheet feeding direction. The trailing edge plate is provided, at opposite sides thereof, with stoppers to be inserted into positioning holes of the push-up plate for fixing the trailing edge plate.