To provide a disclosure document creation device that can reduce a burden on a person who creates a disclosure document.

PDF data conversion means 15b of a central processing unit 15 converts document data created by document creating software to PDF data. At the document data creation, a character string in an undisclosed portion is provided with predetermined character attributes. Character string detecting means 15c detects the character string of the character attributes in the PDF data to acquire position information about the detected character string on a page. Public PDF data creating means 15d specify the area on the page where the character string is to be drawn according to the acquired position information about the character string on the page, and affix a figure drawing command to draw a given filled figure in the specified area to the PDF data, to thereby create public PDF data of the PDF data.