A noninvasive penile erection device is provided having an inflatable sealing adapter that forms a substantially air tight seal between a conventional vacuum tube and a penis inserted therein. The sealing adapter is formed of a rigid tube slidable within the front end of a vacuum tube, and has an inflatable member along its inner circumference adapted to encircle the base of the penis and apply a radially inward force thereto sufficient to create an air tight seal there between during evacuation pumping.
