A medical manipulator (1) comprises an insertion part (50), an arm part (65), a master input part (2), and a control part (8). The insertion part (50) further comprises a bending part (52) in a portion of the insertion part (50). The insertion part (50) is provided with the arm part (65) on the distal end of the insertion part (50). The arm part (65) further comprises an arm (61) and a treatment part (73). An operator (Op) makes a manipulation with the master input part (2). The control part (8) either bends the bending part (52) or operates the arm part (65), in response to an input from the master input part (2). The master input part (2) further comprises fool switches (23) for the operator (Op) to select a mode. When the operator (Op) inserts the insertion part (50) into the body of a patient (P) and selects an insertion mode. In this mode, the arm part (65) is locked, although the bend part (52) is capable of being manipulated. When the operator (Op) carries out a procedure within the body of the patient (P), the operator (Op) selects a treatment mode. In this mode, the bending part (52) is locked, and the arm part (65) is capable of being manipulated.
