RIDING MOWER

PROBLEM TO BE SOLVED: To provide a riding mower including a gas cylinder stably supported at a comparatively lower position of a machine body without interfering a range of view to lessen a possibility of the gas cylinder to contact other subject.SOLUTION: The riding mower includes: right and left driving rear wheels being independently drivable forward and backward, and a pair of right and left steerable front wheels 11. The riding mower includes a support device 3 capable of being mounted with a cylindrical gas cylinder 5 in a horizontal position on an external side of a rollover protection frame 2. The support device 3 is disposed such that the mounted gas cylinder 5 is positioned along front and rear of the rollover protection frame 2 and is mounted in a tilted state in which the central axis of the cylindrical gas cylinder 5 is closer to a central side in a lateral direction of a vehicle body toward a rear side from a plan view.