When indoor machines (C-E) are performing a cooling operation, an air conditioning device (100) controls the third channel switching valves (first electromagnetic valve (11a), second electromagnetic valve (11b), third electromagnetic valve (11c), and fourth electromagnetic valve (11d)) so that the number of intermediate heat exchangers actuating as evaporators is greater than that during the main cooling operation. During the main cooling operation, the air conditioning device (100) sets the target value of the evaporation temperature or the intake pressure in the compressor (1) so as to be the same or less than that when the indoor machines (C-E) are performing a cooling operation, and controls the frequency of the compressor (1) and the capacity of the heat-source-device-side heat exchanger (3).