A power conversion apparatus includes a MOSFET having a channel and a body diode connected in parallel. The channel of the MOSFET becomes conductive according to a control signal, so that a flow path of a regenerative current of an inductor is formed, and the body diode of the MOSFET causes the regenerative current of the inductor to flow in a forward direction. The power conversion apparatus also includes a shunt resistor and a voltage measuring unit which measure an amount of a current flowing into the MOSFET. In addition, the power conversion apparatus includes a threshold designating unit which designates a threshold current amount, and a synchronous rectification prohibiting circuit which prohibits supplying the control signal when the amount of the current measured by the shunt resistor and the voltage measuring unit is greater than the threshold current amount designated by the threshold designating unit.