Abstract: An apparatus for producing and maintaining a penile erection in a male suffering from erectile dysfunction includes a resilient ring member defining an inner opening through which the penis is inserted. The inside circumferential surface adjacent the inner opening is supple and adapted to contact the shaft of the penis. The cross-sectional area of the inner opening is adjustable between a minimum cross-sectional area which is sized sufficiently small to restrict the return venous blood flow from the penis to the torso (i.e. restrict excessive venous leakage) and larger cross-sectional areas. The apparatus includes a pair of spaced apart handles extending outwardly from the resilient ring member which allow the user of the apparatus to quickly adjust the cross-sectional area of the inner opening. In use, a flaccid penis is inserted through the inner opening of the resilient ring member and the resilient ring member is placed in the closed position at the base of the penis adjacent the torso.