To provide an air conditioning device capable of eliminating working load in a filter cleaning work.

This air conditioning device 100 comprises a filter 21, a dust box 81, a slider 83, a slider driving portion 82, a dust discharge unit 84 and a control portion 60. The filter 21 is disposed inside of an indoor machine casing 2, and removes dust from the air taken inside of the indoor machine casing 2. The dust box 81 can store the dust separated from the filter 21. The slider 83 is disposed inside of the dust box 81. The slider driving portion 82 moves the slider 83. The dust discharge unit 84 discharges the dust stored inside of the dust box 81 to the outside of the indoor machine casing 2. The control portion 60 performs a dust discharging operation by interlocking the slider driving portion 82 and the dust discharge unit 84.