Abstract: A penile implant includes a hollow elastomeric internal cylinder that is coaxial with an external cylinder both of which are rounded at the distal end and suitably secured to one another at this location. The space between the cylinders is designed to receive fluid through a laterally extending port for pressurizing the implant to achieve the erectile state. A root section is adapted to be fastened to the proximal end of the outer cylinder.When it is desired to implant the prosthesis, the root section is disassociated from the coaxial cylinders and a tool, in rod form, is inserted into the internal cylinder for facilitating the placement of the prosthesis into the dilated corpus cavernosum. When the distal end of the prosthesis is properly located, the surgeon holds the distal end of the prosthesis through the wall of the penis and then removes the tool from the internal cylinder.