A guidance device for providing guidance on the basis of information acquired from a map information providing device, the guidance device comprising: map information storage means adapted to store map information used for guidance; update information acquiring means adapted to acquire, from the map information providing device, differential update information for updating the map information stored in the map information storage means, the differential update information corresponding to a difference between the map information in the map information storage means and the map information in the map information providing device; map information updating means adapted to update, on the basis of the differential update information acquired by the update information acquiring means, the map information stored in the map information storage means; temporarily delivered information acquiring means adapted to acquire, from the map information providing device, temporarily delivered information that is used for providing guidance inside an area within a predetermined distance from a present position until the map information updating means completes the update, the temporarily delivered information having an identical data structure to the map information and being replaceable with the map information, the temporarily delivered information being usable for guidance instead of the map information; temporarily delivered information storage means adapted to store the temporarily delivered information acquired by the temporarily delivered information acquiring means; and guidance means adapted to provide guidance, until the map information updating means completes the update, on the basis of the temporarily delivered information stored in the temporarily delivered information storage means, and to provide guidance, after the map information updating means completes the update, on the basis of the map information updated by the map information updating means. map information storage means adapted to store map information used for guidance; update information acquiring means adapted to acquire, from the map information providing device, differential update information for updating the map information stored in the map information storage means, the differential update information corresponding to a difference between the map information in the map information storage means and the map information in the map information providing device; map information updating means adapted to update, on the basis of the differential update information acquired by the update information acquiring means, the map information stored in the map information storage means; temporarily delivered information acquiring means adapted to acquire, from the map information providing device, temporarily delivered information that is used for providing guidance inside an area within a predetermined distance from a present position until the map information updating means completes the update, the temporarily delivered information having an identical data structure to the map information and being replaceable with the map information, the temporarily delivered information being usable for guidance instead of the map information; temporarily delivered information storage means adapted to store the temporarily delivered information acquired by the temporarily delivered information acquiring means; and guidance means adapted to provide guidance, until the map information updating means completes the update, on the basis of the temporarily delivered information stored in the temporarily delivered information storage means, and to provide guidance, after the map information updating means completes the update, on the basis of the map information updated by the map information updating means. <EOS>