A document reading apparatus, comprising: a document-feeding unit that feeds a document one page at a time from the starting page; a document-reading unit that reads the document that is fed by the document-feeding unit, and converts the document to image data; a file-storage apparatus that stores the image data as an image file for which access authority is set; a file-search unit that, when a specified number of pages at the start of the document are read by the document-reading unit according to an instruction from a user, searches from the file-storage apparatus for an image file that corresponds to the document and that is accessible by the user as a corresponding image file; a notification unit that notifies of the corresponding image file that is found by the file-search unit; and a file-creation unit that creates the image file of the document that is converted to the image data when no corresponding image file is found, or when the found image file is not used; characterized in that the document reading apparatus includes: a page-number-setting unit that receives a setting for a total number of pages of the document to be read; wherein when the corresponding image file does not include all of the pages set by the page-number setting unit, the document-reading unit continues reading the part of pages that are not in the corresponding image file of the document and converts the read pages to the image data; and the file-creation unit creates an image file that is configured in pages and includes pages in the corresponding image file from a page that corresponds to the first page of the document up to the last page of the corresponding image file, and image data of the part of pages that are not in the corresponding image file that is converted by the document-reading unit. a document-feeding unit that feeds a document one page at a time from the starting page; a document-reading unit that reads the document that is fed by the document-feeding unit, and converts the document to image data; a file-storage apparatus that stores the image data as an image file for which access authority is set; a file-search unit that, when a specified number of pages at the start of the document are read by the document-reading unit according to an instruction from a user, searches from the file-storage apparatus for an image file that corresponds to the document and that is accessible by the user as a corresponding image file; a notification unit that notifies of the corresponding image file that is found by the file-search unit; and a file-creation unit that creates the image file of the document that is converted to the image data when no corresponding image file is found, or when the found image file is not used; characterized in that the document reading apparatus includes: a page-number-setting unit that receives a setting for a total number of pages of the document to be read; wherein when the corresponding image file does not include all of the pages set by the page-number setting unit, the document-reading unit continues reading the part of pages that are not in the corresponding image file of the document and converts the read pages to the image data; and the file-creation unit creates an image file that is configured in pages and includes pages in the corresponding image file from a page that corresponds to the first page of the document up to the last page of the corresponding image file, and image data of the part of pages that are not in the corresponding image file that is converted by the document-reading unit. a page-number-setting unit that receives a setting for a total number of pages of the document to be read; wherein when the corresponding image file does not include all of the pages set by the page-number setting unit, the document-reading unit continues reading the part of pages that are not in the corresponding image file of the document and converts the read pages to the image data; and the file-creation unit creates an image file that is configured in pages and includes pages in the corresponding image file from a page that corresponds to the first page of the document up to the last page of the corresponding image file, and image data of the part of pages that are not in the corresponding image file that is converted by the document-reading unit.