An improved work vehicle is disclosed in which a vertical shaft V-type engine having vertically supported crankshaft with the pair of right and left cylinders being arranged in V-shape is housed inside the front bonnet that is forwardly downwardly inclined at the top. The work vehicle, while having no less excellent performance in terms of power output, noise, and vibration, provides more increased operability and a wider range of forward visibility than conventional horizontal opposed type engine vehicles.