A master operation input device operates a slave manipulator provided with joints adapted to multiple degrees of freedom. The master operation input device includes a grip portion and a first operation portion. The grip portion is variable in position and orientation while being gripped by an operator. The grip portion is configured to give command values regarding the position and orientation of a distal end of the slave manipulator in accordance with the variation in position and orientation. The distal end is the farthest end when the slave manipulator is viewed from a fixed end thereof. The first operation portion is located to be operable by a fingertip of the operator when the grip portion is gripped. The first operation portion is operable independently of the grip portion.
