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 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 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 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 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. <EOS>