A battery controlling apparatus for a vehicle and effectively prevents overcharge upon battery charging with a simple configuration is provided.The battery controlling apparatus for a vehicle includes a charging ratio detection section 1b for detecting a charging ratio of a battery 4 upon starting of constant current control, an elapsed time measurement section 2a for measuring elapsed time from a point of time at which the constant current control starts, a timeout setting section 2c for setting timeout time of the constant current control based on the charging ratio detected by the charging ratio detection section 1b, and a current cutoff section 2d for cutting off current to be supplied to the battery 4 when the elapsed time measured by the elapsed time measurement section 2a, upon the constant current control, exceeds the timeout time set by the timeout setting section 2c.