POWER CONVERSION DEVICE

A power conversion device includes a plurality of power modules; a plurality of smoothing capacitors; a first DC bus bar; and a second DC bus bar. The first and second DC bus bars include positive and negative electrode bus bars laminated on each other. The plurality of Smoothing capacitors are disposed between the first DC bus bar and the power module. The first DC bus bar includes a protrusion portion that passes between the plurality of smoothing capacitors and extends to a disposition side of the power module, and a first connection portion connected to the smoothing capacitor. The protrusion portion includes a second connection portion connected to the second DC bus bar. The second DC bus bar includes a third connection portion connected to the power module and a fourth connection portion connected to the second connection portion.