Provided are an air circulator and an air cleaner including the air circulator. The air circulator includes a housing having a first inlet and a first outlet formed thereof and including an outer wall; an oblique-flow fan disposed in the housing to suck air through the first inlet and then discharge the air through the first outlet to a front of the housing; and a motor rotating the oblique-flow fan. An outer wall of the housing includes a first outer wall extending in a front-rear direction, the first outlet being formed on a front portion thereof; and a second outer wall having the first inlet formed in a rear portion thereof and extending from an edge of the first inlet towards the first outer wall to be enlarged in a radially outward direction. An outer surface of the second outer wall comprises a first surface that extends towards the first outer wall to be rounded outwards, and forms a surface continuous with an outer surface of the first outer wall, thus guiding air flowing along an outside of the first inlet so that the air flows forwards along the outer surface of the first outer wall.