To provide a character input device capable of inputting characters and easily inputting a simple sentence by allowing a user to specify a required character string from a list of previously registered character strings.

An input judging part 2 judges the contents of a user's input from an input part 1, a registered word processing part 3 properly outputs character string data when the input is the selecting operation of registered characters or adjunct data when the input is the selecting operation of a previously set adjunct from a storage part 5 and a display part 4 successively displays these outputted character string data on the screen. Consequently a character string can be inputted by a style closer to a user's request.