NOVELTY - The apparatus has electrically-conductive members (3) provided with a high-voltage-side electrode (4) and a ground lateral electrode (5). Each electrode is embedded in insulating layers (7) across an inflow side channel. High voltage is applied between the electrically-conductive members for generating plasma discharge. A particulate matter and exhaust gas i.e. nitrogen oxides, are adsorbed by the apparatus to an inner wall surface (8) of a honey-comb channel such that combustion loss and restoration loss are carried out, and the exhaust gas is purified.    USE - Exhaust-gas purification apparatus for purifying a hazardous substance e.g. particulate matter and soot, of exhaust gas i.e. nitrogen oxides, emitted from a combustion apparatus e.g. boiler and motor engine such as petrol engine and gasoline engine. Can also be used for a burner and black smoke.    ADVANTAGE - The high voltage is applied between the electrically-conductive members for generating plasma discharge, and the particulate matter and the exhaust gas such as nitrogen oxides, are adsorbed by the apparatus to the inner wall surface of the honey-comb channel, so that the combustion loss and the restoration loss are carried out and the exhaust gas is purified, thus increasing intensity of the apparatus in a simple manner and reducing the manufacturing cost.    DETAILED DESCRIPTION - The ceramics are selected from alumina, cordierite, aluminum nitride, titanic acid aluminum, and zeolite. The zeolite, or a gamma alumina is formed in an inner side of an inflow side channel of a honey-comb channel. The reducing agent supply apparatus supplies reducing agents such as hydrocarbon type gas, fuel, ammonia and urea.    DESCRIPTION OF DRAWING(S) - The drawing shows a front view of an end surface of an inflow side of exhaust gas in a ceramic honeycomb member.    Electrically-conductive members (3)    High-voltage-side electrode (4)    Ground lateral electrode (5)    Insulating layers (7)    Inner wall surface (8)