A power converter includes a plurality of ports provided to a housing, a plurality of conversion circuit electrically connected to the respective ports, and a plurality of coils electrically connected to the respective power conversion circuits and wound around a transformer core. The plurality of coils including a predetermined first coil electrically connected to a predetermined conversion circuit and a second coil. The conversion circuit is mounted to a predetermined board, while the first coil is fixed along the periphery of a board hole of the predetermined board. The predetermined board is fixed to the housing in the state in which the transformer core is inserted into the board hole to determine the position of the predetermined coil relative to the second coil.