In the present invention, there are provided a movement member (87) which includes an engaging section (88), which is engaged with an intermediate part of an operation shaft (54) of a joystick device (45), and operates as one body with the operation shaft (54) at a time of performing an inclining operation of the operation shaft (54), and a damper case (83) in which the movement member (87) is movably inserted, and which holds a viscous fluid (86) which increases a sliding resistance of the movement member (87) when the movement member (87) is moved. Thereby, a desired operational sensation can be always obtained, and a stable bending operation can be performed.
