PURPOSE: A plasma air cleaner is provided to purify by a plasma discharge reaction while passing through multiple ground pipes after the inflow of relatively large quantity of air and purify air by a relatively even plasma density. CONSTITUTION: A plasma air cleaner includes a main body(110), multiple ground pipes(120), a discharge electrode(130), a discharge electrode fixed bar(140), a power applying part, multiple helical flow guide members(150), a central main body(151), and multiple guide vanes(152). The main body is equipped with an air inflow chamber(111) and an air outflow chamber which are mutually separated. One part of the multiple ground pipes is connected to the air inflow chamber and the air outflow chamber which are parallel to each other. The discharge electrode is arranged along the inner center of the ground pipe, is separated with the ground pipe, and is prepared at the each ground pipe in order to generate a plasma discharge reaction with the ground pipe. The discharge electrode fixed bar forms a discharge electrode connection hole combined with the discharge electrode in a central part thereof, forms a bar shape forming a ground pipe mounting part in which the end part of the ground pipe is mounted, and is made of an insulating material. The power applying part applies power for a plasma discharge reaction in the ground pipe and the discharge electrode. The multiple helical flow guide members include a central main body and multiple guide vanes. The central main body forms a discharge electrode penetration hole in which the discharge electrode penetrates. The multiple guide vanes are protruded from the outer periphery of the central main body and induce the helical flow of fluid. The guide vane is made of an insulating material.본 발명은, 일단부에 공기 유입실이 형성되며 타단부에 공기 유출실이 형성되되 상기 공기 유입실과 상기 공기 유출실은 서로 이격되어 배치되는 본체 ； 일단부가 상기 공기 유입실에 연통되며 타단부가 상기 공기 유출실에 연통되도록 마련되며, 서로 평행하게 배치되는 복수의 접지관 ； 상기 접지관의 내부 중앙을 따라 배치되며 상기 접지관과 이격 위치되어 상기 접지관과 플라즈마 방전 반응을 일으키도록 상기
