The present invention relates to a portable air-conditioning device (1), comprising a compressor (2) enabling the cooling cycle, a condenser (3) enabling heat to be discharged to the outer environment by condensing a refrigerant, an evaporator (4) enabling cooling the ambient air, at least one PCM package (5) obtained by packing phase change material (PCM) with high heat storage capacity into a container, transferring and storing the heat of the condenser (3), and a thermistor (6) measuring the temperature of the PCM packages (5).