[Summary] A mower unit receiving power transmitted from a drive source includes a blade pulley mounted on a blade rotational shaft, an idle pulley unit, and a single belt routed around an output pulley of the drive source, the idle pulley unit and the blade pulley. The pulley height of the idle pulley unit is set higher than the pulley height of the blade pulley, and a belt portion of the belt running between the output pulley and the idle pulley unit extends to pass over and above the other belt portion.
