To simply inform the condition of a drawer to anyone by providing a simple means automatically displaying the drawer to be in a locked state or in an unlocked state on the front face of the drawer.

An operation handle and a lock plate 9 provided on the front face of a drawer are interlocked with each other so that the lock plate 9 can be moved to a locked position and an unlocked position by operating the operation handle, and a display window is provided on the front face of the drawer. An interlocking member (rotary plate) 25 moving interlocking with the lock plate 9 is arranged in rear of the display window, and when the lock plate 9 is moved onto the locked position and the unlocked position, a display showing the locked position and the unlocked position is provided on the surface of the interlocking member 25 conformed to the display window.