An air flow controller for an air cleaner, comprising: a fan; a housing, the fan being provided in the housing and the housing being movable from an initial horizontal position in which the air flow controller directs air flow in a vertical direction to an inclined position in which the air flow controller directs air flow in a diagonal direction; and a rotation guide including a first rotation guide that guides the rotation of the air flow controller in a first direction and a second rotation guide that guides the rotation of the air flow controller in a second direction, wherein the first direction is a clockwise direction or a counterclockwise direction with respect to an axial direction of the air flow controller and the second direction is upward or downward direction with respect to said axial direction, the air flow controller characterized in that: the first rotation guide further comprises a fixing guide to support a lower side of the second rotation guide, the fixing guide includes a first guide surface which guides the upward or downward direction rotation of the second rotation guide, the first guide surface forms at least a portion of an upper surface of the fixing guide and extends rounded in the upward direction, corresponding to a rotational path of the second rotation guide, and the initial horizontal position is a position at which a top of the air flow controller extends horizontally with respect to an axial direction of the air flow controller, and the inclined position is a position at which the top of the air flow controller extends at an angle with respect to the axial direction. a fan; a housing, the fan being provided in the housing and the housing being movable from an initial horizontal position in which the air flow controller directs air flow in a vertical direction to an inclined position in which the air flow controller directs air flow in a diagonal direction; and a rotation guide including a first rotation guide that guides the rotation of the air flow controller in a first direction and a second rotation guide that guides the rotation of the air flow controller in a second direction, wherein the first direction is a clockwise direction or a counterclockwise direction with respect to an axial direction of the air flow controller and the second direction is upward or downward direction with respect to said axial direction, the air flow controller characterized in that: the first rotation guide further comprises a fixing guide to support a lower side of the second rotation guide, the fixing guide includes a first guide surface which guides the upward or downward direction rotation of the second rotation guide, the first guide surface forms at least a portion of an upper surface of the fixing guide and extends rounded in the upward direction, corresponding to a rotational path of the second rotation guide, and the initial horizontal position is a position at which a top of the air flow controller extends horizontally with respect to an axial direction of the air flow controller, and the inclined position is a position at which the top of the air flow controller extends at an angle with respect to the axial direction. a first rotation guide that guides the rotation of the air flow controller in a first direction and a second rotation guide that guides the rotation of the air flow controller in a second direction, wherein the first direction is a clockwise direction or a counterclockwise direction with respect to an axial direction of the air flow controller and the second direction is upward or downward direction with respect to said axial direction, the air flow controller characterized in that: the first rotation guide further comprises a fixing guide to support a lower side of the second rotation guide, the fixing guide includes a first guide surface which guides the upward or downward direction rotation of the second rotation guide, the first guide surface forms at least a portion of an upper surface of the fixing guide and extends rounded in the upward direction, corresponding to a rotational path of the second rotation guide, and the initial horizontal position is a position at which a top of the air flow controller extends horizontally with respect to an axial direction of the air flow controller, and the inclined position is a position at which the top of the air flow controller extends at an angle with respect to the axial direction. the first rotation guide further comprises a fixing guide to support a lower side of the second rotation guide, the fixing guide includes a first guide surface which guides the upward or downward direction rotation of the second rotation guide, the first guide surface forms at least a portion of an upper surface of the fixing guide and extends rounded in the upward direction, corresponding to a rotational path of the second rotation guide, and the initial horizontal position is a position at which a top of the air flow controller extends horizontally with respect to an axial direction of the air flow controller, and the inclined position is a position at which the top of the air flow controller extends at an angle with respect to the axial direction.