A noncontact charging device, comprising: an alternating current, AC, adaptor; an oscillator; a driver; a mounting portion on which a device charged in a noncontact manner is mountable; a primary transmission coil for supplying power to a secondary transmission coil provided to the device by the use of electromagnetic induction; a temperature-detecting element for detecting a temperature of a material mounted on the mounting portion the temperature-detecting element being smaller than the primary transmission coil; and control circuit for receiving identification information through the primary and secondary transmission coils from the mounted device and for providing, via the primary and secondary transmission coils, identification information of the noncontact charging device in order that mutual authentication can be attained whereby after the mutual authentication has been attained, charging of a battery of the mounted device is initiated, wherein when the charging is initiated, the control circuit is configured to convert a DC power from the AC adaptor into an AC power at a predetermined frequency on the basis of an oscillating frequency signal from the oscillator, the AC power being supplied to the primary transmission coil through the driver, and terminating the power supply to the primary transmission coil when a predetermined temperature or higher is detected by the temperature-detecting element, wherein the temperature-detecting element is located on a side of a contact surface between the mounting portion and the primary transmission coil, and the center of the temperature-detecting element is located within a range of the diameter of the primary transmission coil from the center position of the primary transmission coil. an alternating current, AC, adaptor; an oscillator; a driver; a mounting portion on which a device charged in a noncontact manner is mountable; a primary transmission coil for supplying power to a secondary transmission coil provided to the device by the use of electromagnetic induction; a temperature-detecting element for detecting a temperature of a material mounted on the mounting portion the temperature-detecting element being smaller than the primary transmission coil; and control circuit for receiving identification information through the primary and secondary transmission coils from the mounted device and for providing, via the primary and secondary transmission coils, identification information of the noncontact charging device in order that mutual authentication can be attained whereby after the mutual authentication has been attained, charging of a battery of the mounted device is initiated, wherein when the charging is initiated, the control circuit is configured to convert a DC power from the AC adaptor into an AC power at a predetermined frequency on the basis of an oscillating frequency signal from the oscillator, the AC power being supplied to the primary transmission coil through the driver, and terminating the power supply to the primary transmission coil when a predetermined temperature or higher is detected by the temperature-detecting element, wherein the temperature-detecting element is located on a side of a contact surface between the mounting portion and the primary transmission coil, and the center of the temperature-detecting element is located within a range of the diameter of the primary transmission coil from the center position of the primary transmission coil.