To provide a document storage device which can easily determine the breaks of a document sent by using a multiple message transmission function or a document storage device which can easily recognize a display of whether the owner of a document is selected.

This device is provided with a page number deciding means 13 which decides page information given on a transmission side from FAX- received image data, a page order decision means 16 which decides document break positions according to the page information, and a storage control means 15 which stores a series of documents as different documents by break positions, and the FAX reception side sections the series of received documents into documents by using the page information given to the documents that the FAX transmission side sends by using the multiple message transmission function.