A conveyor belt with a guide includes: a flat belt; and a guide projecting from a surface of the flat belt on a side of a pulley along a longitudinal direction; the flat belt and the guide being integrally molded with an elastic material. Thus, the guide cannot be detached from the flat belt, thus achieving a high traveling stability and conveying performance for a long time. It is preferable that a core wire or cloth should be embedded in the flat belt, and further, that a vertical groove should be formed along a longitudinal direction at a bottom of the guide.