Abstract: A vehicle charging device is provided and efficiently operates a converter to charge a battery mounted within vehicles. The vehicle charging device includes a power-supply unit that provides a direct current (DC) voltage and a DC/DC converter that converts the DC voltage received from the power-supply unit into a battery charging voltage. The converter also includes an active snubber that is mounted to a secondary coil of a main transformer. The converter is configured to reduce a peak noise generated from the secondary coil using the active snubber and transmit the resultant voltage having the reduced peak noise to an output terminal.