A mobile communication terminal apparatus of the present invention has a mail transmitting function, and stores therein a first mail text that includes particular data, and at least one destination. Also, the mobile communication terminal apparatus stores therein, for each of parties including the destination, replacement information that shows whether a party corresponding thereto requires mail text replacement. If the replacement information corresponding to the destination shows that mail text replacement is not required, the mobile communication terminal apparatus transmits the first mail text to the destination. If the replacement information corresponding to the destination shows that mail text replacement is required, the mobile communication terminal apparatus composes a second mail text from the first mail text by editing at least the particular data, and transmits the second mail text to the destination.