Module (1) for the production of concrete elements, particularly of concrete semi-finished products or of relatively “thin” in-situ concrete surfaces, with a plurality of displacement bodies (5, 5′, 5″, 5′″) able to be inserted arranged adjacent to each other in a longitudinal direction, in which the plurality of displacement bodies (5, 5′, 5″, 5′″) arranged adjacent to each other is arranged respectively undetachably in a latticework (2) of bars (3, 3′, 4, 4′, 4″), in which the displacement body (5, 5′, 5″, 5′″) is formed as a substantially oblate rotation ellipsoid with two at least slightly flattened pole sides (7, 7′, 8, 8′).