A slip ring mechanism for a medical manipulator, the slip ring mechanism including: a rotating rod that rotates together with a drive shaft; rotating terminals that are positioned so as to be coaxial to the rotating rod; conductive members that contact the rotating terminals and are electrically connected to an end effector; holding members that hold the conductive members such that the conductive members are sandwiched between the holding members and the rotating terminals; and contact terminals that contact the rotating terminals so as to be capable of rotating and sliding relative thereto.