A covering lid includes a first plate portion provided with plural insertion portions into which a screw portion of a fastener having the screw portion and a head portion having a diameter larger than the screw portion is inserted and having a first surface facing an inside of a device and a second surface facing an outside of the device, the first plate portion being fixed by the plural fasteners of which the screw portion is inserted into each of the plural insertion portions so as to cover an opening of a device housing extending upward, downward, and rightward, and leftward; and a second plate portion extending apart from the first plate portion to a second surface side of the first plate portion so as to face at least some insertion portions on the same upper, lower, left, or right side of the opening among the plural insertion portions, being removed from the device housing, and being provided with a hook portion hooked to the fastener attached to the device housing in a state where the first surface faces the outside of the device and in a state where the head portion is apart from a surface of the device housing.