order to transmit the message and the current location data as an email step s 28 the receiver b 39 s cellular phone set 1 receives the data in the email step s 32 then the controller 7 extracts the current location data attached to the message step s 34 and then accesses to the map memory 14 to obtain the map data of the designated area including the current location designated by the current location data and stores the data temporarily in the work memory step s 36 the above mentioned processing will transmit the current location data making use of the email function of the cellular phone set 1 furthermore the transmission procedure by email described above is just an example so that the invention enables the current location to be transmitted making use of email functions with other various procedures now the method of acquiring the map data through internet will be explained fig4 shows an outline configuration of the system when internet is used in fig4 a base station 30 for communication with the cellular phone set 1 and a map information providing site 34 are connected to the internet 32 the base station 30 works as a connection between the cellular phone set 1 and the internet 32 the map information providing site 34 comprises a map information providing server 35 and a map data base 36 the map data base 36 stores map data for various areas a user can utilize the cellular phone.