A cosmetic device 10 for performing iontophoresis on the skin 40 of a human, includes carbon sheet electrodes 33A and 33B to be mounted on the skin 40 of the human, and provides an electric signal to the carbon sheet electrodes 33A and 33B, the electric signal being obtained by superimposing an AC signal and a high-frequency signal that has a frequency higher than a frequency of the AC signal while setting a position to which the high-frequency signal is superimposed at a polar region of the AC signal that does not contribute to the iontophoresis.
