An information providing device for communicating with a plurality of vehicles via a network, said information providing device comprising: an information acquiring part for acquiring a current location of a vehicle and an amount of energy stored in an energy storage unit of the vehicle from each of the plurality of vehicles via the network; a vehicle selecting part for selecting one or more vehicles as available vehicles for energy supply from the plurality of vehicles based on the respective current locations and the amounts of stored energy of the plurality of vehicles, the one or more vehicles to be selected being capable of supplying charging energy to a target vehicle requiring charge of an energy storage unit thereof; and a notifying part for notifying passenger of the target vehicle of an available vehicle for energy supply selected by the vehicle selecting part, characterised in that the information acquiring part further acquires respective destinations of the plurality of vehicles; the information providing device further comprises an energy amount specifying part for specifying an amount of available energy to be supplied to a different vehicle based on the respective destinations, the current locations, and the amounts of stored energy of the plurality of vehicles; and the vehicle selecting part selects a vehicle from the plurality of vehicles as an available vehicle for energy supply having available energy to be supplied in an amount greater than an amount of energy to be charged to the energy storage unit of the target vehicle requiring charge. an information acquiring part for acquiring a current location of a vehicle and an amount of energy stored in an energy storage unit of the vehicle from each of the plurality of vehicles via the network; a vehicle selecting part for selecting one or more vehicles as available vehicles for energy supply from the plurality of vehicles based on the respective current locations and the amounts of stored energy of the plurality of vehicles, the one or more vehicles to be selected being capable of supplying charging energy to a target vehicle requiring charge of an energy storage unit thereof; and a notifying part for notifying passenger of the target vehicle of an available vehicle for energy supply selected by the vehicle selecting part, characterised in that the information acquiring part further acquires respective destinations of the plurality of vehicles; the information providing device further comprises an energy amount specifying part for specifying an amount of available energy to be supplied to a different vehicle based on the respective destinations, the current locations, and the amounts of stored energy of the plurality of vehicles; and the vehicle selecting part selects a vehicle from the plurality of vehicles as an available vehicle for energy supply having available energy to be supplied in an amount greater than an amount of energy to be charged to the energy storage unit of the target vehicle requiring charge. the information acquiring part further acquires respective destinations of the plurality of vehicles; the information providing device further comprises an energy amount specifying part for specifying an amount of available energy to be supplied to a different vehicle based on the respective destinations, the current locations, and the amounts of stored energy of the plurality of vehicles; and the vehicle selecting part selects a vehicle from the plurality of vehicles as an available vehicle for energy supply having available energy to be supplied in an amount greater than an amount of energy to be charged to the energy storage unit of the target vehicle requiring charge.