The invention provides a manipulator which can carry out a treatment having a large moving amount in a manipulator leading end while being compact. The manipulator is provided with a manipulator shaft portion (110), a first rod (109) supported so as to be capable of linearly moving with respect to the manipulator shaft portion (110) and driven by a driving force of a driving source, a first gear (112) rotatably supported to the first rod (109), a first rack (113) supported to the manipulator shaft portion (110), a second rack (115) supported so as to be capable of linearly moving in the same direction as the first rod (109) with respect to the manipulator shaft portion (110), and a end-effecter (400) driven by the driving force of the second rack (115). The first rack (113) and the second rack (115) are arranged in such a manner that respective cogged surfaces come face to face. The first gear (112) is pinched between the first rack (113) and the second rack (115), and is arranged in an engaged state.
