A power circuit includes bus bars that are connected to terminals of an FET and are provided flush with each other, and a first insulation region arranged between the bus bars. The power circuit includes a bus bar to which the FET is fixed, a conductive sheet that is connected to another bus bar via a first connection portion and electrically connects source terminals of the FET to the other bus bar, and a second connection portion that is provided in the conductive sheet and electrically connects the source terminals to the other bus bar.