A grass mower includes a cutting height adjustment mechanism (6) for adjusting a cutting height of a mower unit (4) via a lift link mechanism (5). The cutting height adjustment mechanism (6) has a cutting height control grip (62) disposed upwardly of a fender unit (3) and on a first outer side of the driver's seat (11) in the vehicle body transverse direction, a cam body (7) disposed downwardly of the fender unit (3) and closer to a center of the vehicle body in the vehicle body transverse direction than the cutting height control grip (62), a rotational rod (61) extending obliquely through the fender unit (3) and connecting the cutting height control grip (62) with the cam body (7), and a stopper body (8) for selectively determining a cutting height of the mower unit (4) in association as it comes into contact with one of a plurality of contact faces formed in the cam body (7).
