Abstract: A vacuum generator for fuel tank ventilation may include a fluid feed-through body having at least two plastic parts, in particular plastic shells. The fluid feed-through body may have an overpressure conduit section connectable to an overpressure source, in particular downstream of a turbo charger and downstream of a throttle valve of a motor vehicle engine, an intake conduit section connectable to the fuel tank and a delivery conduit section connectable to a motor vehicle engine, and a venturi nozzle into which the overpressure conduit section opens. The intake conduit section may open into a vacuum side of the venturi nozzle. At least the venturi nozzle may be made of a plastic piece.