A static electric therapy apparatus is disclosed which does not leave a user discomfort. The static electric therapy apparatus comprises an electric potential generator connected to an alternating power supply, and an output terminal which provides a human body with electric potential by touching the human body, which output terminal is connected to the electric potential generator; and the static electric therapy apparatus is characterized in that it further comprises a ground wire connected to the output terminal; a direct-current power supply applying negative voltage to the output terminal, which is connected to the output terminal in series; and a transfer switch which switches the case where the output terminal is connected to the potential generator and the case where the output terminal is connected to the ground wire, the switch being connected to the output terminal. Also, the static electric therapy apparatus comprises an electric potential generator connected to an alternating power supply, and an output terminal which provides a human body with electric potential by touching the human body, which output terminal is connected to the electric potential generator, and the static electric therapy apparatus is characterized in that it farther comprises a voltage reducer which gradually decreases the voltage applied to the output terminal when finishing the use of the static electric therapy apparatus.