A cooler and a display device including the cooler. The cooler includes: a housing; an air blowing unit disposed inside the housing and sucking external air and blowing the external air in the housing, wherein the air blowing unit includes a plurality of groups each including two air blowers; a guide vane disposed above the air blowing unit and to guide air flowed out from the air blowing unit to flow in different directions; and a plurality of auxiliary guide vanes disposed between the air blowing unit and the guide vane, and each disposed in each of the groups each including two air blowers, so as to guide air flowing below the air blowing unit to flow toward the guide vane.