<p>To realize an air conditioning apparatus, which can integrate a consumption watt without using a dedicated watt counting device and which can shorten control wiring for the watt measurement. The air conditioning apparatus has an outdoor apparatus (1) and an indoor apparatus supplied with a commercial power through a wattmeter (3), which is provided with a transmission device for transmitting a pulse signal by measuring the watt supplied to the outdoor apparatus (1) and the indoor apparatus, and though a power supply line (4). The wattmeter (3) and the outdoor apparatus (1) are connected to communicate through a control wire (5). The outdoor apparatus (1) and the indoor apparatus are connected to communicate with a centralized controller through a transmission line (7). The outdoor apparatus (1) is provided with a wattmeter connecting circuit (10) for receiving a signal relating to the watt from the wattmeter (3), and a control unit (11) for integrating the watt on the basis of the received signal relating to the watt.</p>
