An object of the present invention by improving the circulation efficiency of the air flow, without increasing the air volume to provide an air purifier that can significantly increase the effect of improving the indoor air environment. The air cleaner (1) has a bottom surface (F) is provided on, is arranged in the vicinity of the room-side wall surface (W1) is used, the inlet 122 and the air filter 150 and the outlet 131 and provided with a blower 170 do. Outlet 131 the distance to the central position from the room side of the wall surface (W1) L [㎜], air outlet, and a distance 131 up to the room ceiling surface from the central location to the H [㎜], a distance L of 100 < L
