A vacuum pump, in particular a turbomolecular pump, comprising at least one rotor which has a rotor shaft and a plurality of rotor sections which are arranged at the rotor shaft , which are axially spaced apart along the rotor shaft and which each comprise a plurality of rotor blades arranged distributed in the peripheral direction; and at least one stator which is associated with the rotor and which has a plurality of stator sections which each have a plurality of stator blades arranged distributed in the peripheral direction, wherein a respective stator section is arranged in the axial direction between a first and a second rotor section and is in each case arranged adjacent to these two rotor sections , wherein a first axial spacing (A1) is provided between the first rotor section and a respective stator section and a second axial spacing (A2) is provided between the respective stator section and the second rotor section , wherein the second axial spacing (A2) is different from the first axial spacing (A1), wherein the first rotor section is arranged before a respective stator section in the pump direction (P) and the second rotor section is arranged after the respective stator section in the pump direction (P), wherein the first axial spacing (A1) is smaller than the second axial spacing (A2), characterized in that the first axial spacing (A1) amounts to less than 0.7 times the second axial spacing (A2); and in that the two different spacings (A1, A2) of a respective stator section from the two adjacent rotor sections are defined by corresponding spacer rings between the individual stator sections . at least one rotor which has a rotor shaft and a plurality of rotor sections which are arranged at the rotor shaft , which are axially spaced apart along the rotor shaft and which each comprise a plurality of rotor blades arranged distributed in the peripheral direction; and at least one stator which is associated with the rotor and which has a plurality of stator sections which each have a plurality of stator blades arranged distributed in the peripheral direction, wherein a respective stator section is arranged in the axial direction between a first and a second rotor section and is in each case arranged adjacent to these two rotor sections , wherein a first axial spacing (A1) is provided between the first rotor section and a respective stator section and a second axial spacing (A2) is provided between the respective stator section and the second rotor section , wherein the second axial spacing (A2) is different from the first axial spacing (A1), wherein the first rotor section is arranged before a respective stator section in the pump direction (P) and the second rotor section is arranged after the respective stator section in the pump direction (P), wherein the first axial spacing (A1) is smaller than the second axial spacing (A2), characterized in that the first axial spacing (A1) amounts to less than 0.7 times the second axial spacing (A2); and in that the two different spacings (A1, A2) of a respective stator section from the two adjacent rotor sections are defined by corresponding spacer rings between the individual stator sections . <EOS>