To provide an installer creating apparatus which can keep the setting of an existing device driver when an OS is reinstalled.

The installer creating apparatus is provided with: an acquisition means (step S301) for acquiring setting information on a device driver stored in an HDD; a creating means (step S304) for creating a new INF file used by an installation application when the device driver is installed on the basis of information of an INF file corresponding to the acquired device driver; a change means (step S304) that acquires file information included in the device driver, and adds the acquired file information to the new INF file and changes the file; and a collection means that collects a file of the device driver based on the file information added by the change means, and copies it into a predetermined area.