To improve failures such as snaking of a belt and damage of a guide and the belt, by applying a means for providing a plurality of friction coefficients to a belt butting surface of at least one pulley, in a conveying belt having a guide function extended between a driving pulley and a driven pulley.

A belt body 10 of a guide-function including belt is made of polyester fiber or the like, and formed with a layered product in which a cover layer 9 made of thermoplastic resin, PVC or the like is applied onto both surfaces and one surface of a core body sail cloth layer 1 impregnated or coated with thermoplastic resin such as polyurethane or PVC. The central part of the lower surface of belt body 10 is adhered with a guide function with V-shaped cross section in the longitudinal direction of the belt, and the central part of the bottom of a guide portion 6 is provided with a vertical groove 3 for securing an adhesion force with this conveying pulley over the entire length of the guide. A small diameter portion 8 of a pulley body 4 is coated with lower friction material or fluorine base coating and imparted with a friction coefficient lower than that of a large diameter portion 7 of the pulley.