Obtained is a power conversion device including a small-sized and low-cost fuse portion which allows overcurrent to be assuredly interrupted when being applied and allows a semiconductor element to be protected from a short-circuit fault or the like. The power conversion device includes: a circuit board; a semiconductor element mounted on the circuit board; a snubber capacitor; a snubber circuit wire which connects the snubber capacitor in parallel to the semiconductor element; and a fuse portion formed at a part of the snubber circuit wire.