The self-contained endocavitary probe device for managing stress incontinence is capable of being inserted into the vaginal or rectal cavity of a person. The device includes at least one self-contained electrical power supply so as to supply power to at least one device for measuring the variation in a parameter resulting from physical stress and to at least one electrical muscle stimulation device in contact with at least one muscle capable of maintaining urinary continence. The electrical stimulation device is activated in the event of variation in the parameter.