An automated guided vehicle has plural conveyors for transferring materials to be transferred mounted on a self-propelling dolly and juxtaposed in a transverse direction. Each of the conveyors includes plural part conveyors whose operation can be controlled individually and arranged in tandem in a transferred direction. One or three or more part conveyors may be disposed or arranged in tandem in the direction of the vehicular width. One or three or more part conveyors may be disposed or juxtaposed in the transverse direction.