NOVELTY - Gas treatment comprises generating a non-equilibrium plasma in a gas flow space; and treating a gas containing a substance to be treated using the plasma. The plasma is generated using at least two wire-like high-voltage applying electrodes in between at least two flat-plate ground electrodes arranged face to face in parallel to each other to define the gas flow space, in a direction perpendicular to opposite sides of the ground electrodes.    USE - Used for treating a gas, containing e.g. volatile organic compounds for reducing air pollution.    ADVANTAGE - The process achieves reduction in electric field intensity requisite for dielectric breakdown, and secures a large gas flow space.    DETAILED DESCRIPTION - Gas treatment comprises generating non-equilibrium plasma in a gas flow space; and treating a gas containing a substance to be treated using the non-equilibrium plasma. The non-equilibrium plasma is generated by using at least two wire-like high-voltage applying electrodes that are arranged away from each other, in between at least two flat-plate ground electrodes that are arranged face to face in parallel to each other to define the gas flow space, in a direction perpendicular to opposite sides of the flat-plate ground electrodes.    An INDEPENDENT CLAIM is also included for a gas treating apparatus (1) having a gas flow space (10) for generating non-equilibrium plasma to treat a gas containing a substance to be treated, comprising at least two flat-plate ground electrodes (11a, 11b) that are arranged face to face in parallel to each other to define the gas flow space; and at least two wire-like high-voltage applying electrodes (12a, 12b) that are arranged away from each other, in between the opposing fiat-plate ground electrodes, in a direction perpendicular to opposite sides of the flat-plate ground electrodes.    DESCRIPTION OF DRAWING(S) - The figure is a sectional view schematically showing a gas treating apparatus.    Gas treating apparatus (1)    Gas flow space (10)    Two flat-plate ground electrodes (11a, 11b)    Wire-like high-voltage applying electrodes (12a, 12b)