Sowing element for pneumatic precision seed drills, comprising a gasket (15) interposed between a stationary surface of a pneumatic manifold (2) and a rotating surface of a disc distributor (4). The gasket (15) comprises a central portion (20) which is partially peripherally surmounted by a sealing sector (24) in which an annular passage (25) opens, fastening means (28, 29) for the gasket being provided between the central portion (20) of the gasket and the manifold (2) of the sowing element. The central portion (20) comprises a first and a second flange (21, 22) which are interconnected in offset planes, the first flange (21) being interposed between the second flange (22) and the sealing sector (24), the fastening means (28, 29) being provided between the second flange (22) and the manifold (2).
