WORK VEHICLE

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