An object of the present invention is to provide an air conditioner that can prevent wasteful heating of a refrigerant when the heating load or the load demanded by defrosting operation is large and that can quickly make a space to be air conditioned comfortable. The air conditioner ( 1 ) of the present invention comprises a heat generating member ( 11f ) , an electromagnetic induction heating unit ( 6 ), an air conditioning target space temperature detecting unit ( T42 ), an outdoor air temperature detecting unit ( T24 ), and a control unit ( 11 ). The heat generating member thermally contacts a refrigerant piping ( 10f ) and/or the refrigerant that flows through the refrigerant piping. The electromagnetic induction heating unit comprises a magnetic field generating part (68 ). The magnetic field generating part generates a magnetic field in order to heat the heat generating member by induction heating. The control unit, when the refrigeration cycle is performing heating operation or defrosting operation, inhibits the generation of the magnetic field by the magnetic field generating part in the case wherein the temperature of the space to be air conditioned and the outside air temperature do not satisfy a first prescribed condition or the case wherein temperature the difference between a target set temperature and the temperature of the space to be air conditioned does not satisfy a second prescribed condition.