The present invention relates to an air conditioner inserted into a steam generator and a housing provided to the inside of the housing to have a robot cleaner coupled with an indoor unit main body. The present invention can easily clean a heat exchanger with a stem injector which is provided to one end of the heat exchanger to be moved toward the other end and easily remove foreign substances of the heat exchanger and a surface of an air filter with a suction member which is provided to one end of the heat exchanger and the air filter to be moved toward the other end.
