An air conditioner is provided. The air conditioner includes a compressor having a suction unit and a plurality of injection inlets, an inside heat exchanger into which refrigerant compressed in the compressor is introduced during a heating operation, an outside heat exchanger into which refrigerant compressed in the compressor is introduced during a cooling operation, a plurality of refrigerant separation devices through which refrigerant condensed in the inside heat exchanger or the outside heat exchanger pass, a plurality of injection flow paths which extends from the three refrigerant separation devices to the plurality of injection inlets, and a bypass flow path which extends from any one injection flow path among the plurality of injection flow paths to the suction unit of the compressor.