A power conversion apparatus 2 has a configuration in which a plate-like bus-bar 80, 80′ is disposed vertically so that a width direction thereof is set in a vertical direction, electrically connected to positive electric potential of a battery and fixed to a resin case 50 to include a flat plate-like bus-bar body 81, 82, to which positive electric potential of the battery is applied, and a voltage measuring terminal 82 to 85 branched from the bus-bar body 81, 82. The voltage measuring terminal 82 to 85 includes a projecting portion 83 projecting from the bus-bar body 81, 82, an upright portion 84 extending from the projecting portion 83 upward toward a circuit board 100, and a measuring terminal portion 85 that is an upper part of the upright portion 84 and electrically connected to the circuit board 100.