Provided is a rechargeable fan device that includes a fan; a motor that drives the fan to rotate; a battery that supplies power to the motor; a voltage generation unit that generates a control voltage of a predetermined voltage value based on DC power inputted; a first supply path used to supply DC power from the battery to the voltage generation unit; a semiconductor switch that brings the first supply path into/out of conduction; a DC jack used to input DC power from an external DC power source; a second supply path used, when the DC power is inputted into the DC jack, to supply the DC power to the voltage generation unit; and a control unit that controls driving of the motor and charging of the battery.