A document managing apparatus includes a determining unit which determines whether a document print image can be generated or not when the document is entered in file managing information in which a data file is entered, the data file constituting the document which is a managing target, a print image generating unit which generates the document print image when the determining unit determines that the document print image can be generated, the document print image being entered as the file in the file managing information, an application start-up unit which starts up an application program according to the document when the determining unit determines that the document print image cannot be generated, and a screen dump generating unit which generates a screen dump of the document entered as the file in the information based on the document displayed on a display unit by the application program started.