A bipolar electrode of the type adapted to be electrically and physically coupled to a body tissue is disclosed as comprising a helix-configured electrode to be screwed into the body tissue and an annular-shaped electrode disposed about the helical electrode for surface contact with the tissue, and first and second flexible electrodes coupled respectively to the aforementioned electrodes. Each of the flexible electrodes has a proximal end adapted for connection to a power supply and a distal end portion for connection to the one of the aforementioned electrodes. The helix-configured electrode is partially covered with an inert insulating material with the tip of the helical electrode being exposed. The annular-shaped electrode is disposed about the helical electrode whereby an intense field is formed between the annular-shaped electrode and the exposed tip of the helical electrode, thus insuring efficient stimulation of the tissue and minimum current drainage of the power supply, e.g. a battery.