A male sexual impotence prosthesis apparatus comprises an operable prosthesis implanted in the cavities of the corpora cavemosa of a patients penile tissue for providing erect penile condition, when the prosthesis is operated. The prosthesis is operable by an implanted operation device. A control device is provided for controlling a source of energy, which may or may not be implanted, from outside the patients body, to release energy for use in connection with the operation of the prosthesis, i.e., to power the operation device. The patient uses the control device to operate the prosthesis to achieve erection.