An object of the invention is to provide a power conversion device which secures insulation and is miniaturized still more without being affected by electromagnetic noises. A power conversion device according to the invention includes a power semiconductor module which converts a DC current into an AC current and includes a DC positive terminal and a DC negative terminal, and a resin cover portion which includes an insulating portion disposed between the DC positive terminal and the DC negative terminal. The cover portion holds a metal member which covers the DC positive terminal and the DC negative terminal.