Abstract: While an interferon therapy is a conventional method for treating hepatitis C, no particular option exists currently in the treatment except for this interferon therapy. An object of the present invention is to provide a novel method for treating hepatitis C. The present invention includes a method for treating hepatitis C comprising warming a liver region of a human by sandwiching an upper abdominal region of a human body between electrodes on the front and back by supplying a high-frequency electric power to these electrodes.