In a guiding method, an object of interest existing in a vicinity of a guidance point, at which a driver of a vehicle needs guidance, on a travel path of the vehicle is retrieved. A recognizable range the driver will have is estimated based on at least one of (a) time required to provide guidance with respect to the object of interest and (b) time required for the driver to visually check the object of interest after receiving the guidance. The guidance with respect to the object of interest is provided when the object of interest exists in the estimated recognizable range.