A medical manipulator includes an insertion part including an external cylindrical tube that has a bendingly manipulable bending part and that has flexibility a manipulation part an arm part which is provided on a distal end part of the insertion part a mode-input part which is provided on the manipulation part and is capable of inputting a mode and a control part that selectively controls the bending part and the arm part such that the bending part and the arm part are controlled to enter one of two states consisting of a locked state in which the bending part and the arm part are locked in a predetermined state in which the manipulation input is not accepted, and a non-locked state, on the basis of the manipulation input and a mode input to the mode-input part.
