Abstract: In the illustrated embodiment, a compression plate is support-mounted parallel to the breast support plate, and is adjustable relative to the breast support plate for the purpose of adjusting its spatial interval from the breast support plate. The compression plate has a cut-out section (12) of such a size that a larger portion of the breast is left exposed. At the margin of the cut-out section there is a marking (13, 14), reproducible on an X-ray film, for the purpose of locating a specific point in the cut-out section.