The invention relates to an insulation insert that can be inserted into a plug-in connector housing (11) of a plug-in connector (10), wherein in the insulation insert (1), at least one contacting element for electrically contacting a conductor core of a cable (12) to be connected may be provided, wherein the insulation insert (1) is provided in one area with a conductive coating, wherein the coated area forms a shielding element (3) that can be electrically contacted with a shielding braid of the cable (12) to be connected and at the same time with the plug-in connector housing (11), and wherein the insulation insert (1) and the shielding element (3) are integrally formed in.