Abstract: Disclosed herein is an instrument for the electrotherapeutic self-treatment of pain and insomnia comprising a set of three plates, coplanar one with respect to the other and interspaced, the two outside ones of which are connected to the negative pole of a current generator constituted by a microbattery, while the one in the center is connected to the positive pole. The outside plates and the one in the center define electrodes made of metal of different characteristics, the former zinc and the latter brass.In this way, two different electric fields are originated: one at the surface due to the diversity in the nature of the electrodes and one deep-seated due to the auxiliary generator.