To provide a movable headlamp capable of flashing over a surface of the ground in front of a front wheel on a machine body turning direction side accurately and flashing over a comparatively wide scope even toward a non-turning side in a lighting system of a working vehicle such as a tractor provided with the movable headlamp for changing the direction of flashing in the same direction as the direction of the front wheel by steering wheel operation.

This lighting system of the working vehicle is provided with a direction control means 25 for controlling in such a way that change of the direction of flashing of the headlamp provided on a steering wheel 9 cutting side is larger than change of the direction of flashing of the headlamp provided on the other side among a pair of right and left movable headlamps 3L, 3R.