Pipetting device with a displacement device with a displacement chamber with a displaceable limiter, a attachment for connecting to a pipette tip and a connecting channel between the displacement chamber and the free end of the attachment, a drive device for driving the displaceable limiter of the displacement device with a drive member, which has a releasable cooperation with the displaceable limiter, and a bayonet connection between the drive device and the displacement device which can be established by creating the cooperation between the drive member and the displaceable limiter and can be released by releasing the cooperation between the drive member and the displaceable limiter.