PURPOSE: A power conversion device for a fuel cell is provided to reduce current peak of a current inverter of a push-pull convertor and the winding of a transformer by using twice switching frequency of a push-pull convertor. CONSTITUTION: A power conversion device for a fuel battery is comprised of a non-insulating DC/DC converter(100) and two stages installing DC/DC converter. The power conversion device for a fuel battery is comprised of one stage inductor by sharing an non insulating inductor of DC/DC convertor and power source. A condenser corresponding to a middle power source is removed from a common structure. The power conversion device is formed by connecting two stage DC/DC converter.
