The invention relates to a shielded plug-in connector (1), provided with a shield housing (2), on which a cylindrical crimp sleeve (3) is formed. A substantially cylindrical moulded part (4) has partial cylindrical longitudinal grooves (5), into which the exposed shield jackets (7) of coaxial conductors (6) can be inserted. The moulded part (4) can be introduced, together with the coaxial conductors (6) into the crimp sleeve (3). The latter is compressed using a serrated crimping tool, whereby the moulded part (4) is deformed in such a way that the longitudinal grooves (5) contract and the shield jackets (7) are tightly encompassed.