An update information providing server for providing data of an updated portion in map data composed of plural kinds of the data, the server comprising: a map data storage unit configured to store incremental update data of a difference between the data at a predefined time and newest data, and a data size of the incremental update data for every data kind of each piece of the data included in the map data, characterized in that the data kind differs according to a function used in a vehicle and includes route calculation data, map drawing data, guidance data, address search data, establishment data, icon data, and the like, and in that the server further comprises: an update request receiving unit configured to receive from a user terminal a map data update request including a capacity of a recording medium where update information is stored, and priority information for specifying a data kind of data that is needed first by a user to be preferentially updated; an update order information making unit configured to specify the incremental update data for every data kind when the update request receiving unit receives the map data update request to make update order information for specifying an update order of the data kind in order of functions needed preferentially by a user and indicating to update the map data in order of starting from the data of a data kind specified by the priority information included in the map data update request; 0195-67.220EP-CM/Kf an update information transmission unit configured to extract the incremental update data for every data kind from the map data storage unit, to make update information including the extracted incremental update data and the update order information, and to transmit the made update information to the user terminal. a map data storage unit configured to store incremental update data of a difference between the data at a predefined time and newest data, and a data size of the incremental update data for every data kind of each piece of the data included in the map data, characterized in that the data kind differs according to a function used in a vehicle and includes route calculation data, map drawing data, guidance data, address search data, establishment data, icon data, and the like, and in that the server further comprises: an update request receiving unit configured to receive from a user terminal a map data update request including a capacity of a recording medium where update information is stored, and priority information for specifying a data kind of data that is needed first by a user to be preferentially updated; an update order information making unit configured to specify the incremental update data for every data kind when the update request receiving unit receives the map data update request to make update order information for specifying an update order of the data kind in order of functions needed preferentially by a user and indicating to update the map data in order of starting from the data of a data kind specified by the priority information included in the map data update request; 0195-67.220EP-CM/Kf an update information transmission unit configured to extract the incremental update data for every data kind from the map data storage unit, to make update information including the extracted incremental update data and the update order information, and to transmit the made update information to the user terminal. an update request receiving unit configured to receive from a user terminal a map data update request including a capacity of a recording medium where update information is stored, and priority information for specifying a data kind of data that is needed first by a user to be preferentially updated; an update order information making unit configured to specify the incremental update data for every data kind when the update request receiving unit receives the map data update request to make update order information for specifying an update order of the data kind in order of functions needed preferentially by a user and indicating to update the map data in order of starting from the data of a data kind specified by the priority information included in the map data update request; 0195-67.220EP-CM/Kf an update information transmission unit configured to extract the incremental update data for every data kind from the map data storage unit, to make update information including the extracted incremental update data and the update order information, and to transmit the made update information to the user terminal.