A character input device displays character input information on a display screen with a small area and allows a user to input a desired character by a simple operation even when it is necessary to select the desired character from plural characters to input the desired characters. In a character selection area, a circle is added to a character “NA” and characters in the “NA” series are selected. A ▾ mark is added to an upper part of the circle added to the character of “NA” and a Δ mark is added to a lower part of the circle. By pressing one of an upward and a downward directions of a cross key, the characters can be selected. If the upward direction of the cross key is pressed, the character “NI” is selected and displayed, instead of the character “NA”.