WORK VEHICLE

A work vehicle includes: a body; left and right front wheels provided for the body; and left and right rear crawler units (8) provided for the body. The rear crawler units (8) each include: a drive wheel (16) provided for a rear axle (15) of the work vehicle; a front idler wheel (17) forward of the drive wheel (16); a rear idler wheel (18) backward of the drive wheel (16); a plurality of roller wheels (19) between the front idler wheel (17) and the rear idler wheel (18); a crawler belt (20) wound around the drive wheel (16), the front idler wheel (17), the rear idler wheel (18), and the plurality of roller wheels (19); a track frame (21) swingable about a swing shaft (26) that extends in a left-right direction of the body and holding the front idler wheel (17), the rear idler wheel (18), and the plurality of roller wheels (19); and a position change mechanism (22) configured to move the swing shaft (26) in a front-back direction of the body.