When a hook detection unit (18) detects the off-hook of a handset (8), voice (e.g., "telephone book", the other party's name) sent from a user is input via the handset (8), and a voice recognition unit (110) recognizes the voice, the other party's name and a telephone number stored in a telephone book memory (3) are displayed on a display unit (5). Then, when voice "up/down" is input via the handset (8), another party's name and a telephone number stored in a telephone book memory (3) are switched and displayed on a display unit (5); and when voice "telephone" or "fax" is input, a call is made or a fax transmission started to the other party displayed on the display unit (5).