Air conditioner having humidifying function

An air conditioner having an improved humidifying portion to humidify air in a room is provided. The humidifying portion includes a humidifying member having hygroscopicity and gas permeability, a first air flow passage for taking in air from the outdoors, passing the air through the humidifying member, allowing the humidifying member to absorb moisture included in the air for drying, and letting out the air outdoors, and a second air flow passage for taking in air from the room, passing the air through the humidifying member while heating the air, allowing the moisture absorbed by the humidifying member to evaporate and humidify the air and letting out the air into the room. Thus, only a single air intake opening for humidifying indoor air is necessary on the indoor side, the structure of the air conditioner can be simplified and compact, which makes easier the attachment. If the air conditioner is apart from the outdoors, outdoor air does not have to be taken in, the blowing load and the noise level can be reduced, and reduced power consumption is required compared to a conventional device.