Disclosed herein is an electrotherapy apparatus using low and intermediate frequencies. In the electrotherapy apparatus of the present invention, a user selects one of low and intermediate output modes depending upon need, positive and negative electrodes made of conductive rubber are provided therein, and a vacuum cup is attached to the body. Accordingly, the electrotherapy apparatus of the present invention can be used semi-permanently, the ill side-effects thereof can be prevented, and the desired effects thereof can be maximized.