The electric power conversion apparatus 110 according to the present invention comprises an electric power conversion module 150 for converting electric power from the commercial power supply 112 to converted electric power, a filler container 152 for accommodating said electric power conversion module 150, and a filler 154 with which said filler container 152 is filled, said filler having electric non-conductance and directly embracing said electric power conversion module 150, wherein the melting point of said filler 154 is equal to or lower than a temperature of said electric power conversion module 150 achieved by electric power conversion.