The present disclosure relates to a method for disassembling a plasma display device including PDP (11) having front plate (20) and rear plate (21), metal support plate (14) bonded to rear plate (21) of PDP (11) with bonding member (16) interposed therebetween, and circuit board (15) attached to metal support plate (14). The method includes performing irradiation with infrared rays from a side of front plate (20) constituting PDP (11) while air is sent to circuit board (15) attached to metal support plate (14) to heat bonding member (16) between PDP (11) and metal support plate (14) so as to decrease bonding strength, and then separating PDP (11) from metal support plate (14).