An air purifier may include: a first body having an inlet and an outlet that is open upward; a fan disposed inside the first body and below the outlet; and a second body coupled to the first body and disposed above the outlet, wherein the second body includes: a lower body connected to the first body, and a lower wall extending toward an outside of the first body in a direction crossing an up-and-down direction above the outlet, so that air discharged from the outlet may be guided by the lower wall.