To provide an electronic appliance to be easily disassembled without the need for special equipment such as a high temperature vessel and a heating furnace.

In the case of disassembling an electronic appliance after its durable period, a control part 32 has power supplied to a heater H. At the time the internal temperature of the electronic appliance is raised by the heater H to keep a washer 52 heated to a predetermined temperature or higher, the ring-like washer 52 is opened partially for enlarging its inner diameter so that the washer 52 is detached from the head part 511 of a screw 51. Since the inner diameter of a through-hole 71 of an exterior cover 7 is larger than the outer diameter of the head part 511 of the screw 51, by the detachment of the washer 52, the exterior cover 7 is released from a state fastened to a frame member 6, so that the exterior cover 7 is easily detached from the frame member 6.