Disclosed is an air conditioner. The disclosed air conditioner comprises: a discharge panel arranged on one part of a housing having a first discharge port, and having a plurality of discharge holes so that the air discharged from the first discharge port is discharged at a slower rate than the air discharged from a second discharge port; and a channel control unit provided so as to operate in a first mode in which a portion of the inflow of air from the inlet port is guided to the second discharge port before the air passes through a heat exchanger, a second mode in which a portion of the inflow of air from the inlet port is guided to the second discharge port after the air has passed through the heat exchanger, and a third mode in which the second discharge port is closed.