A range hood is provided to form an air curtain in the streamline shape for improving the prevention of polluted air diffusion and collect impurities such as moisture and oil in the polluted air separately for preventing malfunction of an exhaust fan by the impurities. A range hood includes a discharge part(20) having first to fourth outlets(21-24) formed at a front lower part of an atmospheric air suction chamber(25). A polluted air suction part(30) is formed at a lower part of the discharge part and having a louver(31) and a first path(32). A cover part(40) is formed at a front surface part of the polluted air suction part, and has a handle part at a front side and an oil collecting part and a holding part inside. An auxiliary polluted air suction part(50) is formed of first and second auxiliary louvers(51,52) and a second path(53) formed at a slant plate. An oil collecting box is connected to the first and second paths and an exhaust fan(60) formed in an exhaust chamber(5) for inhaling air in the horizontal direction.
