1. A device for generating an operating procedure manual for software including a captured image of a screen displayed by the software, the device comprising: an image acquiring hardware unit for acquiring a plurality of captured images of a plurality of screens displayed by software in response to a plurality of operations with respect to the software; a dividing hardware unit for dividing the plurality of captured images into a plurality of captured image groups, to each of which at least one captured image acquired in response to at least one operation constituting a meaningful chunk belongs; and a generating hardware unit for generating an operating procedure manual including, for each captured image group, a captured image belonging to that captured image group.