An air-conditioning device can generate ions without interfering with a flow of air from an air outlet, and allows a user to easily change an ion generating electrode. The air-conditioning device includes a wind direction changing plate in an air outlet that blows out air; and an ion generating unit 40 detachably mounted to the wind direction changing plate. A recess is formed in the wind direction changing plate. The recess is larger than the ion generating unit in one direction so that the ion generating unit can be fitted in the recess only in a predetermined position. A guide mechanism is provided that slidably holds the ion generating unit in the recess and slides the ion generating unit toward one end in one direction to secure the ion generating unit to the wind direction changing plate.