A conveyor belt movable along a predetermined feeding direction in a conveying line, the conveyor belt comprising: - a plurality of modular elements (12A, 12B, 12C) arranged in sequence and articulated with one another; and - at least one connecting pin, forming part of the articulation system of the conveyor belt, wherein each modular element (12A, 12B, 12C) comprises in turn: - a respective intermediate portion, which develops along a transverse axis substantially perpendicular to said feeding direction and which is provided with both an upper surface on which the objects to be transported are positioned, and a lower surface, which is opposite to said upper surface; - a front side, a rear side, a first lateral side and a second lateral side of each intermediate portion; - a first plurality of projections, extending along said feeding direction on the front side of each intermediate portion and which are provided with a first plurality of respective through holes aligned along a single axis substantially parallel to said transverse axis; - a second plurality of projections, which extend along said feeding direction, but with opposite direction with respect to the first plurality of projections, on the rear side of each intermediate portion and which are provided with a second plurality of respective through holes aligned along a single axis substantially parallel to the transverse axis, wherein the first plurality of projections and the second plurality of projections have mating profiles, so that the first projections of a first modular element can be interpenetrated with the second projections of an adjacent modular element and the first through holes of the first modular element are arranged along the same axis of the second through holes of the adjacent modular element, so as to allow the insertion of a connecting pin to form the rotoidal joint between said two modular elements (12A, 12 B); - at least one rolling ball; and - at least one housing seat for a respective rolling ball, said housing seat being obtained on said intermediate portion and being provided with at least one respective circular opening placed at said upper surface, wherein each rolling ball projects at least partially through the respective circular opening, wherein each housing seat is internally provided with a plurality of ribs which extend along respective directions which are substantially perpendicular to said upper surface, the conveyor belt being characterized in that the ratio between the diameter of at least one circumferential portion of said housing seat and the diameter of said rolling ball is comprised between 0.8 and 0.6, preferably between 0.79 and 0.7, and in that at least part of said ribs is provided at the bottom, near said lower surface, with at least one respective projecting portion arranged to allow each rolling ball to be snap-fit inserted into the respective housing seat. - a plurality of modular elements (12A, 12B, 12C) arranged in sequence and articulated with one another; and - at least one connecting pin, forming part of the articulation system of the conveyor belt, - a respective intermediate portion, which develops along a transverse axis substantially perpendicular to said feeding direction and which is provided with both an upper surface on which the objects to be transported are positioned, and a lower surface, which is opposite to said upper surface; - a front side, a rear side, a first lateral side and a second lateral side of each intermediate portion; - a first plurality of projections, extending along said feeding direction on the front side of each intermediate portion and which are provided with a first plurality of respective through holes aligned along a single axis substantially parallel to said transverse axis; - a second plurality of projections, which extend along said feeding direction, but with opposite direction with respect to the first plurality of projections, on the rear side of each intermediate portion and which are provided with a second plurality of respective through holes aligned along a single axis substantially parallel to the transverse axis, wherein the first plurality of projections and the second plurality of projections have mating profiles, so that the first projections of a first modular element can be interpenetrated with the second projections of an adjacent modular element and the first through holes of the first modular element are arranged along the same axis of the second through holes of the adjacent modular element, so as to allow the insertion of a connecting pin to form the rotoidal joint between said two modular elements (12A, 12 B); - at least one rolling ball; and - at least one housing seat for a respective rolling ball, said housing seat being obtained on said intermediate portion and being provided with at least one respective circular opening placed at said upper surface, wherein each rolling ball projects at least partially through the respective circular opening,