PROBLEM TO BE SOLVED: To provide a beauty treatment apparatus capable of performing secure iontophoresis by an electric signal output from an output terminal such as an earphone terminal.SOLUTION: A beauty treatment apparatus 10 for performing iontophoresis for a skin 40 of a person includes carbon sheet electrodes 33A and 33B to be placed on the skin 40 of the person. The beauty treatment apparatus superimposes an AC signal having a frequency f of within 1 Hz