To provide a discharge plasma treatment apparatus which can stably and evenly treat a substance to be treated in continuous (rolled) form.

For the discharge plasma treatment apparatus, in which an electric field is applied between a pair of electrodes, at least one of which is covered with a solid dielectric, a treating gas is introduced between the electrodes, and a substance to be treated placed between the electrodes is treated with glow discharge plasma generated, at least one of the electrodes is an endless belt like electrode equipped with a temperature controlling mechanism.