The invention discloses an indoor unit which comprises an enclosure, a wind wheel, a motor, a heat exchanger and an end cap, wherein the enclosure comprises a chassis, a face frame, a first side plate and a second side plate, the face frame is disposed on the chassis, the first side plate and the second side plate are respectively disposed on left and rights sides of the face frame, and the first side plate is disposed on the face frame in a dismountable manner; the wind wheel is disposed inside the enclosure, supporting shafts are disposed respectively at centers of a left end face and a right end face of the wind wheel, a magnetic ring is disposed on the end face of the wind wheel near to the second side plate, the magnetic ring is concentric with the supporting shaft, and a bearing sleeves outside of the supporting shaft near to the first side plate; the motor comprises a stator, the stator comprises a center hole, the magnetic ring sleeves the outer side of the stator, and one of the supporting shafts is stretched into the center hole; the heat exchanger is disposed inside the enclosure and comprises a heat exchanger side plate; and the end cap is connected to the heat exchanger side plate and the chassis in a dismountable manner, and a storage chamber used for bearing storage is disposed on the end cap. In the indoor unit, the first side plate and the end cap can be dismounted, and then the wind wheel can be dissembled, so that internal components can be cleaned thoroughly.