Abstract: A wheel driving device for a loader including a belt type transmission unit adapted to selectively drive wheels of the loader in a normal or reverse direction by power transmitted from an engine to a power transmission unit, the belt type transmission unit having forward and rearward belts for driving the wheels in normal and reverse directions, respectively, clutch type levers respectively mounted on the case at opposite sides of the case, the levers being adapted to selectively apply pressure to the forward and rearward belts, thereby operatively connecting the forward and rearward belts to the wheels, respectively, and hydraulic cylinders each adapted to hydraulically switch each lever between a position where it applies the pressure to each corresponding belt and a position where it releases the pressure applied to the corresponding belt.