A non-contact charging device that performs data transmission with a portable terminal device and supplies electric power to the portable terminal device, the non-contact charging device comprising: a wireless communication unit (101, 614) that performs data transmission; a wireless communication antenna coil (111, 213) that is coupled to the wireless communication unit (101, 614) and used for the data transmission; a power supply coil (113, 212); a resonance coil (112, 211); a variable capacitance circuit coupled to the resonance coil (112, 211); a suppression circuit that is coupled to the wireless communication antenna coil (111, 213) and is configured to make terminals of the wireless communication antenna coil (111, 213) short-circuited so as to suppress a signal from the wireless communication antenna coil (111, 213) from being transferred to the wireless communication unit (101, 614) when electric power is supplied to the portable terminal device; and an adjustment circuit that is coupled to the power supply coil (113, 212) and is set to make impedance matching between the wireless communication unit (101, 614) and the wireless communication antenna coil (111, 213) so as to control communication sensitivity when the data transmission is performed, wherein the resonance coil (112, 211) forms magnetic fluxes with between the wireless communication antenna coil (111, 213) in accordance with data to be transferred when data transmission is performed and forms magnetic fluxes with between the power supply coil (113, 212) in accordance with electric power to be transmitted when electric power is transmitted, wherein a resonance frequency provided by the resonance coil (112, 211) and the variable capacitance circuit is changed for use when wireless communication is performed and when electricity is transmitted. a wireless communication unit (101, 614) that performs data transmission; a wireless communication antenna coil (111, 213) that is coupled to the wireless communication unit (101, 614) and used for the data transmission; a power supply coil (113, 212); a resonance coil (112, 211); a variable capacitance circuit coupled to the resonance coil (112, 211); a suppression circuit that is coupled to the wireless communication antenna coil (111, 213) and is configured to make terminals of the wireless communication antenna coil (111, 213) short-circuited so as to suppress a signal from the wireless communication antenna coil (111, 213) from being transferred to the wireless communication unit (101, 614) when electric power is supplied to the portable terminal device; and an adjustment circuit that is coupled to the power supply coil (113, 212) and is set to make impedance matching between the wireless communication unit (101, 614) and the wireless communication antenna coil (111, 213) so as to control communication sensitivity when the data transmission is performed, wherein the resonance coil (112, 211) forms magnetic fluxes with between the wireless communication antenna coil (111, 213) in accordance with data to be transferred when data transmission is performed and forms magnetic fluxes with between the power supply coil (113, 212) in accordance with electric power to be transmitted when electric power is transmitted, wherein a resonance frequency provided by the resonance coil (112, 211) and the variable capacitance circuit is changed for use when wireless communication is performed and when electricity is transmitted.