A modular belt conveyor (12), in particular curving or helical conveyor, including a number of mutually interconnected modular belt conveyor links (14) that together form a common curving or helical conveyor with an inner and outer belt edge, respectively, of which at least one belt edge, preferably the inner belt edge, interacts by inter-spaced, preferably vertical curve guides, wherein at the belt edge or edges interacting with the curve guide, each of the belt conveyor links (14) are either provided with an edge reinforcement or are fitted with an edge element (20), the edge reinforcement or edge element (20), respectively, together with the corresponding adjacent belt conveyor link (14) forming a substantially closed guide surface (34) at the belt edge in question. In a simple way and by means of simple technical means are hereby achieved the possibility of counteracting the said problems of lateral incisions or apertures at the inner or outer belt edge.