The invention relates to a high-voltage apparatus (1) comprising an internal conductor (2), an insulating body (3) which surrounds the internal conductor along its longitudinal direction and comprises insulating layers (5, 12, 17) which are composed of a synthetic material which is impregnated with a resin, and also electrically conductive control inserts (6, 14) for field control which are arranged concentrically around the internal conductor and are spaced apart from one another by the insulating layers, wherein at least one of the control inserts is a contact insert (14) which is electrically connected to the internal conductor by means of a contact-making device (7, 13), wherein the contact-making device comprises a contact element (7) which is composed of electrically conductive material and is electrically connected to the contact insert. The invention is distinguished in that the contact element (7) is fixed by means of adhesive bonding to a conductive substrate (6) which is in electrical contact with the internal conductor. The invention further relates to a production method for producing the high-voltage apparatus (1) according to the invention.