The invention relates to a shutter for an ion mobility spectrometer (20), the shutter comprising: a first electrode surface (11) with a number of first electrode elements arranged in the first plane and at a distance from each other; a second electrode surface (12) arranged parallel to and at a distance from the first electrode surface and having a number of second electrode elements arranged in the second plane and at a distance from each other; means for applying a potential difference between the first electrode elements and the second electrode elements, and a third electrode surface (13) with a number of third electrode elements arranged in the third plane and at a distance from each other, wherein the third electrode surface is arranged parallel to and at a distance from the first electrode surface and wherein the third electrode surface is arranged on the opposite side of the first electrode surface relative to the second electrode surface.