PURPOSE: To make possible to mount/dismount a large capacity power supply unit easily from the front in the mounting structure of power supply being employed generally in various types of electronic appliances.

CONSTITUTION: The power supply mounting structure comprises a plurality of power supply bars 12 having a coupling face provided with a hole to be fitted with one output terminal 14-1 of a power supply unit 14 at each end and secured laterally to the upper front side of a body 1, a power supply bar 13 for common voltage supply provided with a hole to be fitted with the other output terminal 14-1 and secured laterally to the lower front side of the body 1, a power supply unit 14 arranged with one sides of an input power supply connector 14-2 and a control signal connector 14-3 on the back and projecting the pair of output terminals 14-1 having L-shaped side view from the front to the front of the body 1 in order to make a plurality of fitting holes, and a back panel 15 to be secured to the back of the body 1 and arranged with the other sides corresponding to the one sides of the input power supply connector 14-2 and the control signal connector 14-3 of the power supply unit 14.