To provide a brush device for a vehicle in which efficiency in forwarding the vehicle is improved by expanding a passable road and a road facility, and work can be executed over an area of the width of the vehicle body or more.

The device is provided with a supporting frame 11 mounted freely ascendably/descendably at the front end of a vehicle body from V0 via a bracket V1, a movable frame 12 supported freely telescopically in the lateral direction at the lateral both sides of the supporting frame, a hydraulic cylinder 13 which makes the movable frame to be driven telescopically to the supporting frame, a fixed brush body 14 supported freely rotatably around an axis m to the supporting frame, a movable brush body 15 supported freely rotatably around the axis n to the movable frame, an auxiliary wheel 16 which is supported freely rollably at the lower end of an arm protruded rearward from the lateral both sides of the supporting frame and holds the fixed brush body and the movable brush body at contact positions to the road surface by being grounded rollably on the road surface when the supporting frame is descended, and a rotation drive mechanism 17 which rotationally drives the fixed brush body and the movable brush body via the axis.