The invention relates to an automatic driving assistance device, an automatic driving assistance method, and a program. The automatic driving assistance device is provided with: an information for location identification acquisition means for acquiring information for location identification for identifying a location of a host vehicle while traveling; a level of sustainability acquisition means for acquiring a level of sustainability during automatic driving, said level of sustainability representing to what level can automatic driving be sustained on the basis of the information for location identification; a level of sustainability assessment means for assessing, on the basis of the level of sustainability acquired via the level of sustainability acquisition means, whether it is possible to sustain the automatic driving; a control information determination means for determining, if it is assessed via the level of sustainability assessment means that it is not possible to sustain the automatic driving, vehicle control information which controls the host vehicle on the basis of the information for location identification such that the level of sustainability is increased; and a control information output means for outputting the vehicle control information to a vehicle control device which controls the host vehicle.