A device generates an operating procedure manual for software including a captured image of a screen displayed by the software. An image acquiring hardware unit acquires 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 divides 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. A generating hardware unit generates an operating procedure manual including, for each captured image group, a captured image belonging to that captured image group.