This air conditioner is provided with an electric motor (1), and a power conversion device (1) which uses a vector control method to perform power conversion. The power conversion device (1) is provided with: a pulse control unit (7) for outputting a pulse signal; a power conversion circuit (41) which uses the pulse signal to convert DC power into AC power; a current detection unit (6) which detects the current of the power conversion circuit (41); a vector control unit (8) for generating a command voltage for the pulse control unit (7); and a pulse stopping control unit (9) which generates apulse stopping control signal for stopping the pulse signal in an interval determined using the current phase as a reference, and outputs the pulse stopping control signal to the pulse control unit (7). The vector control unit (8) starts operation of the pulse stopping control unit (9) if the motor current of the electric motor (1) is within a prescribed range of the motor current at the present rotational speed when there is no load.