An air purifier, capable of maximizing air purification capacity thereof while having a minimum installation area, includes a body, a suction unit arranged within the body, having a suction port with a periphery surface that is inclined from a central axis of the body, a discharge unit arranged within the body, having a discharge port with a periphery surface that is inclined from the body, and a blowing unit arranged within the body, to blow air from the suction unit to the discharge unit.