To easily and quickly retrieve and display a necessary mail.

When a telephone book function and a mail function are connected with each other, an operation part 111 specifies a transmission source from a plurality of transmission source data stored in storage media 109, 110 as a telephone book and an operation part 102 extracts received mails related to the transmission source specified by the operation part 111 from received mails stored in the storage media 109, 110 and displays the extracted received mails on a display part 112 as a list. When an incoming history function, a redialing function and the mail function are connected with each other, mails can be retrieved and displayed by using incoming history information and redialing information.