A CPU detects an instruction to activate an address book mode by detecting an operation of an address book key in an incoming call waiting state, and displays an address book data new creation screen or an existing data edition screen in a main display panel by activating an address book viewing/creation/edition program by using an ROM. When "activation of camera" is selected, an imaging unit is activated, display of a corresponding resolution is set in a monitor display area, and images are sequentially displayed. When a picked-up image is determined by detecting an operation of a determination key, image data of the displayed image is stored in an image memory, a link "1" for image display is set in a corresponding address data area in an address book data storage area, and a record number 001 in the image memory storing the image data is stored in a link information storage area in association with 001 in the address book data storage area.