To provide a sexual function enhancement apparatus which improves the contraction of an anastomotic part by strong stimulation to the prostate.

A motor 41 rotary-drives an eccentric weight 42, and the rotational movement of the weight 42 vibrates the rotary shaft of the motor 41. The vibration generated at the rotary shaft is transmitted to a main body part 1 and transmitted to cylinder parts 2 and 3 in addition. With the vibration of the cylinder part, the inner wall of the cylinder part beats the penis to stimulate the corpus cavernosum of urethra in the penis, and this stimulation is transmitted to the prostate.