A central neutral position (N position) in a rotational movement range of a stick shaft (61) of a joystick apparatus (45) attached to a main body part (52) of a remote controller operation portion (12) and rotationally moving about a rotational movement supporting point (O) is set to a tilt angle (¸) tilted toward a grip portion (51) by a predetermined angle and the joystick apparatus (45) is arranged to be tilted to the side of the grip portion (51), so that it is made easy for a finger of an operator to reach the stick shaft (61) of the joystick apparatus (45) even in a state that the operator has grasped the grip portion (51).
