An air conditioner includes an air-conditioner body performing air-conditioning operation, and a remote controller to operate the air-conditioner body. The air-conditioner body includes control unit that performs operation control of the air-conditioner body, and body receiving unit that receives a transmission signal from the remote controller. The remote controller includes temperature detecting unit for detecting temperatures around the remote controller, and remote-controller transmission unit. At the time of cooling operation, the control unit compares the detected temperature received from the remote controller and a preset temperature predetermined. When the detected temperature is lower than the preset temperature, the control unit operates the air-conditioner body so as to reduce a temperature difference between the detected temperature and the preset temperature, or when the detected temperature is equal to or higher than the preset temperature, the control unit operates the air-conditioner body based on the preset temperature.