For each of a plurality of use-side heat exchangers (35a to 35d), a plurality of heat medium flow switching devices (32a to 32d, 33a to 33d) respectively corresponding to the plurality of use-side heat exchangers (35a to 35d) are entirely or partially integrated, and the thus obtained integrated heat medium flow switching device (40) is driven by a single driving device 41 (41 a to 41 d).
