In a method for manufacturing such a modular belt link, a mold having a mold cavity is used comprising a number of U-shaped profiles, which are configured and arranged such as to—after injecting polymeric material into the mold cavity—form an aperture in each of the link ends by providing for each link end at least two laterally adjoining, partly overlapping oblong U-shaped recesses which are alternately oriented such that the open end of one of the U-shaped recesses opens in the top support surface and the open end of an immediately adjoining U-shaped recess opens in the bottom surface. The invention relates also to a modular belt link manufactured with such a method and a modular conveyor belt comprising such modular belt links.