An air conditioner comprising: a housing configured to form an appearance of the air conditioner and comprising at least one direct-wind outlet to discharge air from an inside to an outside of the air conditioner, and an inhaler through which external air is inhaled into the housing of the air conditioner; a heat exchanger positioned inside the housing; a fan configured to generate air flow, such that external air flows through the heat exchanger and into the air conditioner; at least one duct including: a first channel forming surface configured to form a basic channel for guiding the air, and a second channel forming surface configured to form a low wind-speed channel extended from the basic channel; a porous panel corresponding to the second channel forming surface, the porous panel including a plurality of pores; a blade configured to: swivel between a closed position in which the blade blocks the at least one direct-wind outlet of the housing and an open position in which the blade enters into the housing from the at least one direct-wind outlet to open the at least one direct-wind outlet, block the low wind-speed channel at the open position so that the air passed through the basic channel is discharged outside of the air conditioner, direct the air passed through the basic channel to the low wind-speed channel at the closed position, and discharge the air to the outside via the plurality of pores at the closed position; a driver configured to drive the blade to swivel; and at least one processor configured to control the driver. a housing configured to form an appearance of the air conditioner and comprising at least one direct-wind outlet to discharge air from an inside to an outside of the air conditioner, and an inhaler through which external air is inhaled into the housing of the air conditioner; a heat exchanger positioned inside the housing; a fan configured to generate air flow, such that external air flows through the heat exchanger and into the air conditioner; at least one duct including: a first channel forming surface configured to form a basic channel for guiding the air, and a second channel forming surface configured to form a low wind-speed channel extended from the basic channel; a first channel forming surface configured to form a basic channel for guiding the air, and a second channel forming surface configured to form a low wind-speed channel extended from the basic channel; a porous panel corresponding to the second channel forming surface, the porous panel including a plurality of pores; a blade configured to: swivel between a closed position in which the blade blocks the at least one direct-wind outlet of the housing and an open position in which the blade enters into the housing from the at least one direct-wind outlet to open the at least one direct-wind outlet, block the low wind-speed channel at the open position so that the air passed through the basic channel is discharged outside of the air conditioner, direct the air passed through the basic channel to the low wind-speed channel at the closed position, and discharge the air to the outside via the plurality of pores at the closed position; swivel between a closed position in which the blade blocks the at least one direct-wind outlet of the housing and an open position in which the blade enters into the housing from the at least one direct-wind outlet to open the at least one direct-wind outlet, block the low wind-speed channel at the open position so that the air passed through the basic channel is discharged outside of the air conditioner, direct the air passed through the basic channel to the low wind-speed channel at the closed position, and discharge the air to the outside via the plurality of pores at the closed position; a driver configured to drive the blade to swivel; and at least one processor configured to control the driver.