A machine for atmospheric plasma treatment of continuous material substrates comprises means for feeding a substrate for moving it along a feed path; at least two electrodes each positioned at one face of the substrate, each electrode facing a respective face of the substrate, a difference in electric potential being applicable across the electrodes for generating an electric discharge; the feed means comprising at least one first roller and one second roller, the first roller and the second roller coinciding with respective electrodes and each acting on a respective face of the substrate.