The invention relates to an electrode arrangement for a dielectric barrier discharge plasma treatment of an irregularly three-dimensionally shaped surface of an electrically conducting body, which surface is used as a counter electrode, having a first electrode to be coupled to a high voltage source； a dielectric which is formed by a flexible material in such a way that the dielectric shields the first planar electrode from the surface to be treated； a spacer defining a structured surface on a side of said arrangement facing a surface to be treated, such that the structured surface forms one or more spaced compartments that are isolated from the surroundings in order to prevent airflow between the surroundings and the compartments, said first electrode being fitted to the object to be treated and brought in contact with the dielectric, and an isolating cover layer covering the planar electrode.
