Dust collection structure for collecting the dust removed from an air filter of an indoor unit has been devised to reduce user's labor in collecting the dust as much as possible. An indoor unit (13) includes, in a casing (34), an indoor heat exchanger (37), an indoor fan (39) for sucking air from inside of a room, and blowing the air to the inside of the room, and an air filter (40) arranged on an inlet side of the indoor fan (39). The dust trapped on the air filter (40) is removed by the dust removing means (50), and is contained in the dust containing part (60). A nozzle connector (78) for arranging a nozzle (95a) of a cleaner (95) at a predetermined position where suction of the contained dust is allowed is provided at a downstream outlet of a dust collection path (77) as a transfer path for transferring the dust in collecting the contained dust.