An improved type of silicone prosthesis is inserted just below the tunica albuginea penis into the cavernosum of the penis. Soft silicone constitutes the tip and base of the prosthesis to avert intra-vaginal impacts. The base with soft silicone helps the intrapenial prosthesis bend freely around the pubis, and can be cut short to make the length match the individual penis. These advantages of our new flexible silicone penile prosthesis relieve the patients with organic impotence from distress.