A medical manipulator including a base section at which a support surface is formed, a movable part movably supported on the support surface, when a reference direction parallel to the support surface is defined, between a distal end position, which is a distal end side in the reference direction with respect to the base section, and a proximal end position, which is a proximal end side in the reference direction, a positioning mechanism configured to position the movable part at the distal end position with respect to the base section, a holding section movably supported in the reference direction with respect to the movable part and configured to detachably hold a proximal end portion of a treatment tool, and a driving unit configured to move the holding section in the reference direction with respect to the movable part.
