POWER CONVERSION DEVICE

A power conversion device comprise: a power conversion circuit that is configured to convert a supplied electric power to output the converted power; a control circuit that is configured to control an operation of the power conversion circuit; a multilayer substrate that has a different layers, power wiring patterns of the power conversion circuit and a control wiring pattern of the control circuit being arranged on the multilayer substrate, the power wiring patterns being disposed in different layers of the multilayer substrate; a via that extends across the power wiring patterns in the different layers; and a solid-shaped conductive member that is provided in the via to electrically connect the respective power wiring patterns to each other.