To provide an electric apparatus housing panel in which cooling air can be supplied to an inverter transformer without leaking out the vibration and noise of the inverter transformer toward a front side (an operator side).

An electric apparatus such as an inverter transformer which needs cooling and generates vibration and noise is housed in an electric apparatus housing panel. As a means which cools the electric apparatus and prevents the vibration and noise from leaking out, a silencing duct 7a, a shielding plate 8a, a sound absorber 9 and a vibration-proof member 10 are provided in the electric apparatus housing panel. Further, a suction inlet is provided o the lower part of the rear of the housing panel and a cooling fan 2 and an exhaust outlet 6 are provided on the ceiling part of the housing panel.