Apparatus for plasma treatment comprising an electrode arrangement (1; 6; 11; 24; 28; 39; 40) for generating a non-thermal plasma comprising a) a layer-shaped first electrode (2; 7; 12; 29) made of an electrically conductive material, b) a layer-shaped second electrode (4; 8; 13; 32, 33) made of an electrically conductive material, wherein the second electrode (4; 8; 13; 32, 33) is electrically insulated from the first electrode (2; 7; 12; 29), c) a dielectric barrier (3; 9; 18; 21, 22; 30, 31) being arranged between the first electrode (2; 7; 12; 29) and the second electrode (4; 8; 13; 32, 33), so that the non-thermal plasma is generated by a dielectric barrier discharge, wherein d) at least one of the first electrode (2; 7; 12; 29) and the second electrode (4; 8; 13; 32, 33) comprises several perforations which are distributed over the electrode, wherein e) the electrode arrangement is shaped in the form of a hollow tube having an axially aligned inlet for introducing a carrier gas into the tube and an axially aligned outlet for dispensing the non-thermal plasma out of the tube, so that the plasma is generated within the tube, f) the apparatus comprises a fan for blowing a carrier gas into the inlet of the electrode arrangement and axially through the electrode arrangement, and g) a nozzle is attached to the outlet of the electrode arrangement for forming a plasma jet leaving the apparatus, and/or h) a guide pipe is attached to the outlet of the electrode arrangement for directing the plasma jet in a specific direction, and/or i) the guide pipe is flexible so that the direction of the plasma jet can be changed by aiming the guide pipe at a desired location of treatment. a) a layer-shaped first electrode (2; 7; 12; 29) made of an electrically conductive material, b) a layer-shaped second electrode (4; 8; 13; 32, 33) made of an electrically conductive material, wherein the second electrode (4; 8; 13; 32, 33) is electrically insulated from the first electrode (2; 7; 12; 29), c) a dielectric barrier (3; 9; 18; 21, 22; 30, 31) being arranged between the first electrode (2; 7; 12; 29) and the second electrode (4; 8; 13; 32, 33), so that the non-thermal plasma is generated by a dielectric barrier discharge, wherein d) at least one of the first electrode (2; 7; 12; 29) and the second electrode (4; 8; 13; 32, 33) comprises several perforations which are distributed over the electrode, wherein e) the electrode arrangement is shaped in the form of a hollow tube having an axially aligned inlet for introducing a carrier gas into the tube and an axially aligned outlet for dispensing the non-thermal plasma out of the tube, so that the plasma is generated within the tube, f) the apparatus comprises a fan for blowing a carrier gas into the inlet of the electrode arrangement and axially through the electrode arrangement, and g) a nozzle is attached to the outlet of the electrode arrangement for forming a plasma jet leaving the apparatus, and/or h) a guide pipe is attached to the outlet of the electrode arrangement for directing the plasma jet in a specific direction, and/or i) the guide pipe is flexible so that the direction of the plasma jet can be changed by aiming the guide pipe at a desired location of treatment.