A plasma treatment device (1), designed to treat a surface with a dielectric barrier plasma, with an electrode arrangement (5) having at least one electrode (3) and with a dielectric (7) that connects the electrode (3) to the one to be treated Completely covers the surface, and with a housing (9) which contains a line arrangement (11) comprising at least one high-voltage feed line (10, 10a, 10b), the electrode (3) being connected to the line arrangement (11) and via the high-voltage feed line (10, 10a, 10b) can be supplied with a high-voltage signal (13a, 13b) which can be applied to the high-voltage feed line (10, 10a, 10b), enables the combination of an effective plasma treatment with an effective mechanical treatment of the surface to be treated in a simple manner, that the plasma treatment device (1) has a brush head (15) which has a bristle field (17) and a bristle holder (19) with a base surface che (21), wherein the bristle field (17) has a plurality of flexible bristles (23) and spaces between the bristles (23) and the bristles (23) protrude from the base surface (21) of the bristle carrier (19) in the direction of a contact surface (27), which is defined by the ends of the longest bristles (23) of the bristle field (17) facing away from the base surface (21), the bristle field (17) defining one by the distance between the base surface (21) and the contact surface (27) has a first length and wherein the at least one electrode (3) of the electrode arrangement (5), starting from the base surface (21), has a second length that is less than the first length or equal to the first length and is at least 30% of the first length , extends in the direction of the contact surface (27) into the bristle field (17).
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