To provide an air-conditioner with a dust collector for collecting suspended matters in air by high voltage discharge, particularly comprising a high voltage feeding circuit for power supply to the dust collector and a connection part provided in a high voltage wiring passage ranging from the high voltage feeding circuit to the dust collector for connecting the dust collector side to the high voltage feeding circuit, having improved durability and quietness while preventing a harmful discharge phenomenon in the connection part.

The air-conditioner comprises the dust collector provided in an indoor unit for collecting the suspended matters in air by high voltage discharge, the high voltage feeding circuit for power supply to the dust collector, and the connection part provided in the high voltage wiring passage ranging from the high voltage feeding circuit to the dust collector for connecting the dust collector side to the high voltage feeding circuit. The connection part is sealed by a first sealing means.