A railway vehicle with an air conditioning apparatus, the air conditioning apparatus comprising: a compressor to compress refrigerant using power supplied from an overhead line to the railway vehicle; a cooperating devices group to form, together with the compressor, a refrigeration cycle in which the refrigerant circulates, for performing air conditioning of a passenger compartment of the railway vehicle; a compressor heater to heat the compressor by power supplied to the compressor heater, further comprising a power storage device configured to (i) store, during a time period in which power is supplied from the overhead line to the railway vehicle, a portion of the power, and (ii) (ii) supply, during a time period in which power supply from the overhead line to the railway vehicle remains interrupted, power stored therein to the compressor heater, wherein a power supply circuit is installed in the railway vehicle, the power supply circuit converting the power supplied from the overhead line into a form consumable by the compressor and supplying the converted power to the compressor, and the power storage device is configured to detect whether power is supplied from the overhead line to the power supply circuit, and is configured to store power output from the power supply circuit when detecting that power is being supplied from the overhead line to the power supply circuit, and the power storage device is configured to supply power stored therein to the compressor heater when detecting that power supply from the overhead line to the power supply circuit is interrupted. a compressor to compress refrigerant using power supplied from an overhead line to the railway vehicle; a cooperating devices group to form, together with the compressor, a refrigeration cycle in which the refrigerant circulates, for performing air conditioning of a passenger compartment of the railway vehicle; a compressor heater to heat the compressor by power supplied to the compressor heater, further comprising a power storage device configured to (i) store, during a time period in which power is supplied from the overhead line to the railway vehicle, a portion of the power, and (ii) (ii) supply, during a time period in which power supply from the overhead line to the railway vehicle remains interrupted, power stored therein to the compressor heater, wherein (i) store, during a time period in which power is supplied from the overhead line to the railway vehicle, a portion of the power, and (ii) (ii) supply, during a time period in which power supply from the overhead line to the railway vehicle remains interrupted, power stored therein to the compressor heater, wherein a power supply circuit is installed in the railway vehicle, the power supply circuit converting the power supplied from the overhead line into a form consumable by the compressor and supplying the converted power to the compressor, and the power storage device is configured to detect whether power is supplied from the overhead line to the power supply circuit, and is configured to store power output from the power supply circuit when detecting that power is being supplied from the overhead line to the power supply circuit, and the power storage device is configured to supply power stored therein to the compressor heater when detecting that power supply from the overhead line to the power supply circuit is interrupted.