An air conditioner, AC, comprising: a housing ; a heat exchanger arranged to exchange heat with air flowing into the housing of the air conditioner; a fan arranged inside the housing for blowing the air that has exchanged heat with the heat exchanger out of the housing ; and a metal discharging plate , the metal discharging plate including: an opening formed to discharge the air blown from the fan out of the housing ; and a plurality of discharging holes formed to discharge the air from around the opening , characterized in that the plurality of discharging holes each have an area of 0.05mm 2 or greater and 5mm 2 or less, and a sum (B) of the areas of the plurality of discharging holes and an area (A) of the opening satisfy 0.5 < B/A < 10, and in that the air conditioner further comprises a discharging guide arranged between the fan and the metal discharging plate and configured to form a first discharge fluid path allowing the air from the fan to flow forward through the discharging guide when the opening is open and a second discharge fluid path allowing the air from the fan to flow radially out of the discharging guide and through the plurality of discharging holes when the opening is closed. a housing ; a heat exchanger arranged to exchange heat with air flowing into the housing of the air conditioner; a fan arranged inside the housing for blowing the air that has exchanged heat with the heat exchanger out of the housing ; and a metal discharging plate , the metal discharging plate including: an opening formed to discharge the air blown from the fan out of the housing ; and a plurality of discharging holes formed to discharge the air from around the opening , characterized in that the plurality of discharging holes each have an area of 0.05mm 2 or greater and 5mm 2 or less, and a sum (B) of the areas of the plurality of discharging holes and an area (A) of the opening satisfy 0.5 < B/A < 10, and in that the air conditioner further comprises a discharging guide arranged between the fan and the metal discharging plate and configured to form a first discharge fluid path allowing the air from the fan to flow forward through the discharging guide when the opening is open and a second discharge fluid path allowing the air from the fan to flow radially out of the discharging guide and through the plurality of discharging holes when the opening is closed. an opening formed to discharge the air blown from the fan out of the housing ; and a plurality of discharging holes formed to discharge the air from around the opening , characterized in that the plurality of discharging holes each have an area of 0.05mm 2 or greater and 5mm 2 or less, and a sum (B) of the areas of the plurality of discharging holes and an area (A) of the opening satisfy 0.5 < B/A < 10, and in that the air conditioner further comprises a discharging guide arranged between the fan and the metal discharging plate and configured to form a first discharge fluid path allowing the air from the fan to flow forward through the discharging guide when the opening is open and a second discharge fluid path allowing the air from the fan to flow radially out of the discharging guide and through the plurality of discharging holes when the opening is closed. <EOS>