Abstract: A turbomolecular vacuum pump has a hollow stator accommodating a rotor having bladed wheels with bladed disks interposed therebetween. Flat blades of each bladed wheel are spaced circumferentially at the surface of its hub and are inclined to planes perpendicular to the axis of rotation of the rotor toward the side of its rotation. Each blade is disposed so that lines of intersection of its planes with the planes perpendicular to the axis of rotation of the rotor are at an angle to the radii of the wheel hub at a point of intersection of these lines with hub circles, and are directed with respect to the bladed wheel at the gas pressure side to the direction of rotation of the rotor, and with respect to the bladed wheel at the gas suction side to a side opposite to the direction of rotation of the rotor.