An iontophoretic apparatus comprising a housing member, a current distribution member, a medicament containment member and at least one of a lateral and medial straddling member. The bulb includes ring bulbs in each of which straight portions and bent portions are placed alternately on a same plane, by bending partially a glass tube having an outside diameter of 12-20 mm into a rectangular shape, so that opposite ends of the tube terminate with the adjacent straight portions. One layer of fibers of the spiral reinforcement is positioned above a layer of fibers of the annular reinforcement.