POWER CONVERSION DEVICE

A power conversion apparatus includes a smoothing capacitor module having a plurality of one and the other DC terminals arranged in a state of being laminated with each other, a flow channel forming body for forming a cooling medium flow channel that allows a cooling medium to flow along the capacitor module, and a plurality of power semiconductor modules each including a module case having a cooling surface, DC terminals projecting in one direction in a laminated state from the module case, and an AC terminal projecting in one direction from the module case. The power semiconductor modules are fixed to the flow channel forming body so that the cooling surface of the module case of the power semiconductor module is inserted into the cooling medium flow channel and comes into contact with the cooling medium flowing within the flow channel forming body, and the respective DC terminals in the laminated state of the capacitor module extend from the capacitor module toward the corresponding power semiconductor modules, the laminated DC terminal includes a connecting portion in the direction along the flow channel, the respective connecting portions in the direction along the flow channels of the DC terminals of the capacitor module are respectively connected to the DC terminals projecting from the power semiconductor module in the direction across the cooling medium flow channel.