A treatment arrangement for treating a surface of a body with a dielectrically hindered plasma, with an electrode arrangement in which at least one electrode (1a, 1b) is arranged in a base section of the electrode arrangement, is completely shielded by a dielectric towards the surface to be treated, and extends with a connecting conductor (6a, 6b) into a contacting attachment of the dielectric, and with a contacting element (2, 2') comprising a receiving opening (18, 18') for the contacting attachment and a lever arrangement for opening and closing the receiving opening (18, 18') and for pressing a contact pin through a prefabricated recess of the dielectric onto the electrode (1a, 1b) for providing a contact of an alternating high voltage source to the electrode (1a, 1b), the electrode arrangement having at least two electrodes (1a, 1b) that are arranged in the base section and insulated from each other by the dielectric and which each extend with a connecting conductor (6a, 6b) into the contacting attachment, a recess being provided in the dielectric and a contact pin being provided for each connecting conductor (6a, 6b), and at least one of the contact pins being designed with a non-insulated end face for making contact with the associated electrode (1a, 1b), characterised in that this at least one of the contact pins is mounted in the contacting element with a dielectric coating and in that the at least one dielectric coating has an oversize relative to the associated recess in the dielectric by means of which the coating is brought by the lever arrangement into an interference fit of the coating in the dielectric, avoiding an air gap, when the non-insulated end face of the contact pin contacts the associated electrode (1a, 1b). with an electrode arrangement in which at least one electrode (1a, 1b) is arranged in a base section of the electrode arrangement, is completely shielded by a dielectric towards the surface to be treated, and extends with a connecting conductor (6a, 6b) into a contacting attachment of the dielectric, and with a contacting element (2, 2') comprising a receiving opening (18, 18') for the contacting attachment and a lever arrangement for opening and closing the receiving opening (18, 18') and for pressing a contact pin through a prefabricated recess of the dielectric onto the electrode (1a, 1b) for providing a contact of an alternating high voltage source to the electrode (1a, 1b), the electrode arrangement having at least two electrodes (1a, 1b) that are arranged in the base section and insulated from each other by the dielectric and which each extend with a connecting conductor (6a, 6b) into the contacting attachment, a recess being provided in the dielectric and a contact pin being provided for each connecting conductor (6a, 6b), and at least one of the contact pins being designed with a non-insulated end face for making contact with the associated electrode (1a, 1b), characterised in that this at least one of the contact pins is mounted in the contacting element with a dielectric coating and in that the at least one dielectric coating has an oversize relative to the associated recess in the dielectric by means of which the coating is brought by the lever arrangement into an interference fit of the coating in the dielectric, avoiding an air gap, when the non-insulated end face of the contact pin contacts the associated electrode (1a, 1b).