Abstract: A conveyor belt designed especially for conveying particulate material, said belt being provided with a central ribbed portion for tractive engagement with the particulate material, planar portions along its opposite longitudinal edges for extension beneath skirt boards at said edges designed to retain the particulate material on the conveyor belt, and longitudinally extending grooves between the centrally located ribbed portion and the planar portions for receiving the lower edges of skirting fastened to the skirt boards at a level below the level of the surfaces of the planar portions.