An image reading device includes an image scanning portion, a page classification portion, a preview output portion, a page classification correction portion, and a file replacement portion. The preview output portion generates a primary image data file including: a plurality of pieces of page image data; and page classification information that allows the non-blank page and the blank page to be separated from each other, and displays, on a display portion, an image of the non-blank page and an image of the blank page so as to be separated from each other. The page classification correction portion corrects the page classification information according to correction operation. The file replacement portion replaces the primary image data file with a secondary image data file that does not include the data of the blank page.