An air conditioning apparatus comprising: a controller ; at least one outdoor unit including: a compressor ; a flow path switching valve ; an outdoor heat exchanger ; outdoor heat exchanger temperature detecting means for detecting a temperature of the outdoor heat exchanger; and sucking superheating degree detecting means for detecting a sucking superheating degree as a superheating degree of a refrigerant sucked into the compressor; a plurality of indoor units (8a-8d) having an indoor heat exchanger(81a-81d); a refrigerant circuit in which the at least one outdoor unit and the indoor units are alternately connected by a plurality of refrigerant pipes (30, 30a; 31, 31a; 32, 32a), and characterized in that the controller is configured to control the air conditioning apparatus such that when the temperature of the outdoor heat exchanger detected by the outdoor heat exchanger temperature detecting means becomes equal to or higher than a predetermined temperature and the sucking superheating degree detected by the sucking superheating degree detecting means becomes equal to or lower than a predetermined temperature while a reverse defrosting operation to thaw frost forming on the outdoor heat exchanger by causing the outdoor heat exchanger to function as a condenser is being performed, the reverse defrosting operation is ended, and a total operating time of the compressor is reset, wherein a start condition of the oil recovery operation is whether or not the total operating time of the compressor exceeds a predetermined time, and wherein the total operating time is either the total operating time from the start of the compressor or the total operating time of the compressor from when the total operating time is reset. a controller ; at least one outdoor unit including: a compressor ; a flow path switching valve ; an outdoor heat exchanger ; outdoor heat exchanger temperature detecting means for detecting a temperature of the outdoor heat exchanger; and sucking superheating degree detecting means for detecting a sucking superheating degree as a superheating degree of a refrigerant sucked into the compressor; a plurality of indoor units (8a-8d) having an indoor heat exchanger(81a-81d); a refrigerant circuit in which the at least one outdoor unit and the indoor units are alternately connected by a plurality of refrigerant pipes (30, 30a; 31, 31a; 32, 32a), and characterized in that the controller is configured to control the air conditioning apparatus such that when the temperature of the outdoor heat exchanger detected by the outdoor heat exchanger temperature detecting means becomes equal to or higher than a predetermined temperature and the sucking superheating degree detected by the sucking superheating degree detecting means becomes equal to or lower than a predetermined temperature while a reverse defrosting operation to thaw frost forming on the outdoor heat exchanger by causing the outdoor heat exchanger to function as a condenser is being performed, the reverse defrosting operation is ended, and a total operating time of the compressor is reset, wherein a start condition of the oil recovery operation is whether or not the total operating time of the compressor exceeds a predetermined time, and wherein the total operating time is either the total operating time from the start of the compressor or the total operating time of the compressor from when the total operating time is reset. <EOS>