Abstract: An external penile prosthetic device is adapted to be worn on the groin and suprapubic areas of the wearer. The device has a generally tubular outer wall made from a flexible material, having an open proximal end and a closed distal end, the exterior of the outer wall being configured to resemble an erect human penis. The device also has a generally tubular inner wall made from a flexible material having a different degree of durameter firmness than that of the outer wall and an open proximal end and a closed distal end. The inner wall is disposed spacedly and coaxially inside the outer wall and is sealed thereto at least at their respective proximal ends to define a chamber therebetween. A viscous fluid fills the chamber between the outer wall and the inner wall. A flange is disposed around and connected to the proximal end of the outer wall of the prosthetic device for mounting the device over the groin and suprapubic areas of the wearer.