A communication terminal device with which a desired function can be found easily and the function can be activated quickly is provided.A communication terminal device of this invention comprises a housing 8 provided with a display 5, and a touch panel input unit 6 arranged covering a screen of the display 5, and is capable of executing one operation mode selected by a user from a plurality of operation modes. A scroll line 9 is displayed on the screen of the display 5, the scroll line 9 is moved to select one operation mode correlated to the position of the scroll lines 9 in accordance with user's scroll operation, then the selected one operation mode is fixed in accordance with user's mode fixing operation, and a predetermined process of the operation mode is executed in accordance with an operation of an operation key displayed in the operation area.