Disclosed is a vacuum pump. A vacuum pump according to the present invention is characterized by comprising: a pump main body in which a vacuum space portion and an exhaust space portion are provided; a plurality of vacuum modules which are stacked in multiple layers and coupled to each other on the upper portion of the pump main body, and are connected to the vacuum space portion and the exhaust space portion; and a cover housing coupled to the uppermost vacuum module among the plurality of vacuum modules, wherein the plurality of vacuum modules include: a module body having an open top portion and connected to each of the vacuum space portion and the exhaust space portion; a rotating body provided inside the module body and connected to a rotating shaft and rotated; and a module bearing coupled to the module body and rotatably supporting the rotating shaft.