PURPOSE: A power conversion apparatus is provided to minimize the power conversion device by cooling the overall heating member by arranging the heating unit of the heat pipe. CONSTITUTION: A plurality of power semiconductor devices is installed on one side of a progression member(4). A plurality of heat pipes(1, 2) is installed on the other side of the progression member. The plurality of heat pipes is made of more than two kinds of the heat pipe. The plurality of heat pipes comprises a radiating unit(201) installed perpendicular to the progression part(101).
