To obtain a power conversion device capable of reducing a loss of the power conversion device to improve fuel efficiency and electricity efficiency of an electrically driven vehicle. Provided is a power conversion device (1), which is to be mounted to a vehicle (VCL) configured to travel by using a drive motor (M1) as a motive power source. The power conversion device (1) includes inverters (100, 200) each configured to control the drive motor (M1) by having a plurality of switching elements (Q101 to Q106, Q201 to Q206) subjected to switching control. In the power conversion device (1), each of the plurality of switching elements (Q101 to Q106, Q201 to Q206) is formed of a wide band gap semiconductor.