Abstract: An air cleaner includes a housing including a first opening configured to absorb outside air, a second opening configured to discharge the air outside, and a housing body having an internal flow path connecting the first opening and the second opening, a blower unit including a blowing fan configured to blow air accommodated in the internal flow path toward the second opening, and a driving motor disposed between the first opening and the blowing fan and detachably shaft-coupled to the blowing fan, and installed in the internal flow path, a filter installed in the internal flow path and configured to purify air absorbed through the first opening, and a discharge unit including a discharge grille having a plurality of discharge holes formed to allow air reaching the second opening to pass therethrough and detachably coupled to the second opening.