A master operation input device (10) for operating a slave manipulator provided with joints adapted to multiple degrees of freedom includes a grip portion (101) and a first operation portion (102). The grip portion (101) is variable in position and orientation while being gripped by an operator. The grip portion (101) 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 (102) is located to be operable by a fingertip of the operator when the grip portion (101) is gripped. The first operation portion is operable independently of the grip portion (101).
