A male sexual impotence treatment apparatus comprises a constriction device implanted in an impotent male patient and engaging the patient's penile tissue. The constriction device includes an elongate adjustable constriction member extending in a loop around the penile tissue or the prolongation thereof. A connection device releasably connects the end portions of the constriction member to each other and an adjustment device adjusts the longitudinal extension of the constriction member in the loop to temporarily constrict the penile tissue or the prolongation thereof to restrict the penile exit blood flow to achieve erection. The connection device includes a female part and a male part fitting into the female part to lock them together. The design of the connection device facilitates laparoscopic surgery for implanting the constriction member.