A work vehicle comprises: a vehicle frame; a driving portion in which a driver seat is provided; an electric motor for driving the vehicle to travel; and a battery for supplying electric power to the electric motor, the battery including a plurality of battery modules accommodated in a single battery pack. Each of the battery modules is formed as a rectangular box whose longitudinal length is different from its lateral length in a planar view, and the battery modules are arranged adjacent to each other with a short side of one of the battery modules opposing a long side of the other of the battery modules. The battery pack is also formed to conform to the contour of the aggregate of the battery modules.