Provided is an electric potential treatment device that uses an existing converter, has a simple circuit configuration, is able to impart a low-frequency stimulation to a human body, and by means of which a relaxing effect can be expected. The present invention pertains to an electric potential treatment device (1) that performs treatment using an electric field, and has: a first electrode (T1) that is contactlessly disposed opposite a human body (M)； a second electrode (T2) that faces the first electrode (T1) and contacts the human body (M)； a first transformer (21) that is connected to the commercial power supply (A) and imparts a high AC voltage to the first electrode (T1)； a second transformer (22) that is connected to the commercial power supply (A) and imparts a high AC voltage on the second electrode (T2)； and a frequency converter (23) that is provided in the circuit between the commercial power supply (A) and the first electrode (T1) and/or in the circuit between the commercial power supply (A) and the second electrode (T2), and converts the frequency of the commercial power supply (A). A difference is provided between the frequency (F1) of the high AC voltage imparted to the first electrode (T1) and the frequency (F2) of the high AC voltage imparted to the second electrode (T2).
