Abstract: An electrical stimulator is provided for controlling the urethral -- the bladder and/or the rectal function. Said stimulator comprises an obturator to be worn within the vagina or anus. The obturator is made of a flexible material, which can be expanded for providing a safe fixation of the obturator within the body. The obturator is provided with electrodes energized by a pulse generator, said electrodes are arranged in two groups, which are directed towards the same direction, e.g. towards urethra, and thus providing a directional stimulating effect. The pulse generator provides an intermittent stimulation with a biphasic pulse form and with a gradually increasing pulse amplitude up to an adjusted maximum amplitude during each unit of stimulation pulses.