A manipulator comprising: an operation portion, wherein forceps are opened and closed, when a first forceps pulley of a first forceps piece and a second forceps pulley of a second forceps piece rotate in opposite directions to each other, a direction of the forceps is changed when both pulleys rotate in the same direction, and a direction of the forceps can be changed about a P axis (pitch axis)； a first driving portion comprising a left driving pulley and a right driving pulley slidably movable along a Z axis (main axis) direction； and an endless loop-shaped wire rope, wherein in the loop-shaped wire rope, a first engaging body, a second engaging body, a third engaging body and a fourth engaging body are provided one after another on its loop-shaped wire rope main body, and the loop-shaped wire rope is arranged to engage the first engaging body to the first forceps pulley, the second engaging body to the second forceps pulley, the third engaging body to a left driving pulley, and the fourth engaging body to a right driving pulley.
