A vacuum-pump rotor, in particular for turbomolecular pumps, comprising a hub element for connecting to a rotor shaft and/or for forming a rotor shaft, and rotor blades connected to the hub element, wherein the hub element and/or the rotor blades comprise a plurality of material layers, wherein a plurality of rotor blades surrounding the hub element are provided, each comprising a blade foot connected to the hub element and a blade head connected thereto, wherein the hub element comprises at least one holding element, wherein a base element comprising fiber-reinforced material is provided as a material layer, said base element being directly or indirectly connected to the least one holding element, wherein the base element comprises a hub member arranged in the hub element and forms the foot and also the head of a rotor blade, wherein at least one stiffening element preferably comprising a fiber-reinforced material is provided as further material layer/s, said stiffening element being connected to the holding element by face-to-face contact and protruding into the blade foot of the roto blade, wherein the outer contour of the stiffening element corresponds to the outer contour of the hub member and of the blade foot, characterized in that at least one additional blade element (18, 20) comprising fiber-reinforced material is provided as further material layer/s, said additional blade element being connected to the holding element and protruding into the blade foot and into the blade head, the stiffening element, in the area of the blade foot, is in direct abutment on the base element and on the additional blade element (18, 20) by face-to-face contact and is arranged between the base element and the additional blade element, and that the holding comprises a fiber-reinforced material. a hub element for connecting to a rotor shaft and/or for forming a rotor shaft, and rotor blades connected to the hub element, wherein the hub element and/or the rotor blades comprise a plurality of material layers, wherein a plurality of rotor blades surrounding the hub element are provided, each comprising a blade foot connected to the hub element and a blade head connected thereto, wherein the hub element comprises at least one holding element, wherein a base element comprising fiber-reinforced material is provided as a material layer, said base element being directly or indirectly connected to the least one holding element, wherein the base element comprises a hub member arranged in the hub element and forms the foot and also the head of a rotor blade, wherein at least one stiffening element preferably comprising a fiber-reinforced material is provided as further material layer/s, said stiffening element being connected to the holding element by face-to-face contact and protruding into the blade foot of the roto blade, wherein the outer contour of the stiffening element corresponds to the outer contour of the hub member and of the blade foot, characterized in that at least one additional blade element (18, 20) comprising fiber-reinforced material is provided as further material layer/s, said additional blade element being connected to the holding element and protruding into the blade foot and into the blade head, the stiffening element, in the area of the blade foot, is in direct abutment on the base element and on the additional blade element (18, 20) by face-to-face contact and is arranged between the base element and the additional blade element, and that the holding comprises a fiber-reinforced material.