To provide a controlling device for charging the battery for a motorized vehicle which is capable of achieving almost full charging, even if an interval from a charge starting command to the expected time of starting the vehicle is short, and also capable of suppressing memory effects.

This control device is provided with a required charging time calculating means 51, which obtains a required charging time from the residual capacity of a battery 10 and a preset reference charging current value, a maximum controllable time calculating means 52, which obtain a maximum controllable time from the present time and an expected time of starting a vehicle, and a charging current value control means 53, which increases a charging current value within the range of a preset allowable maximum current value, when the maximum controllable time is shorter than the required charging time.