A power converter having a high side switching device and a low side switching device that are connected in series between a positive power supply terminal and a negative side power supply terminal for direct current, the connection point between the high side switching device and the low side switching device being set as an output terminal, and each of the high side switching device and the low side switching device being constructed by a switching device to which a current mirror device is appended, further including a high side current detecting unit for detecting current flowing in the current mirror device of the high side switching device, and a low side current detecting unit for detecting current flowing in the current mirror device of the low side switching device. A signal detected by the high side current detecting unit and a signal detected by the low side current detecting unit are differentiated from each other and set as a current value of the output terminal.