A driving assistance device includes a display unit which displays an energy consumption rate map which shows a distribution of an energy consumption rate during travel of a vehicle, an icon which indicates a current energy consumption rate of the vehicle on the energy consumption rate map, the energy consumption rate being defined by a speed of the vehicle and an acceleration/deceleration of the vehicle, and a direction defining display portion which defines a moving direction of the icon, wherein the energy consumption rate map displays an eco region, which is a region in which the energy consumption rate is lower than a predetermined value, with a color different from those of the other regions of the energy consumption rate map in the display unit.