An electronic illustrated dictionary device includes an illustration highlighter character string hiding unit configured to execute a process of, when an illustration associated with an expository content of an arbitrary headword is displayed on the display unit according to a user operation, displaying a character string highlighted with a highlighter by the illustration highlighter adding unit in invisible form, and a link destination highlighter character string hiding unit configured to execute a process of, when the in-illustration textual content display unit displays an expository content having a character string as a headword highlighted with a highlighter by the illustration highlighter adding unit on the display unit, displaying a character string highlighted with a highlighter by the link destination highlighter adding unit in invisible form.