A work vehicle includes a vehicle frame extending between a right and left pair of rear wheels. An engine is mounted in a vertical position on a horizontal mounting surface defined in the vehicle frame in a peripheral area of the rear wheels in a central portion of a transverse direction of the vehicle. A fuel tank includes a main tank body mounted under a driver's seat and an auxiliary tank body mounted on the mounting surface on one lateral side of the engine in the transverse direction of the vehicle. A canister is mounted adjacent to the engine on one lateral side of the engine and rearwardly of and adjacent to the auxiliary fuel tank.