A wire harness continuity inspection device, comprising: a storage unit that stores codes described in auxiliary device-based wiring information and codes described in region-based connector/wiring information; characterized in that a control unit that is configured to compare a first terminal of a first electrical component and a second terminal of a second electrical component connected by a circuit line, described in the auxiliary device-based wiring information stored in the storage unit with terminals connected to both ends of an electrical wire connecting the first terminal of the first electrical component and the second terminal of the second electrical component, described in the region-based connector/wiring information stored in the storage unit, wherein the control unit is further configured to refer to first region-based connector/wiring information to specify a first certain electrical wire and a second certain electrical wire of which one end is connected to the other end of the first certain electrical wire which are described in the first region-based connector/wiring information, and regard the first certain electrical wire and the second certain electrical wire as a single electrical wire by virtually fitting the first certain electrical wire and the second certain electrical wire, refer to first auxiliary device-based wiring information to specify a first terminal of a first electrical component and a second terminal of a second electrical component connected by a circuit line, described in the first auxiliary device-based wiring information, after regarding as the single electrical wire, refer to the first region-based connector/wiring information to specify a first electrical wire of which one end is connected to the first terminal of the first electrical component described in the first region-based connector/wiring information, and determine whether a terminal connected to the other end of the first electrical wire is identical to the second terminal of the second electrical component. a storage unit that stores codes described in auxiliary device-based wiring information and codes described in region-based connector/wiring information; characterized in that a control unit that is configured to compare a first terminal of a first electrical component and a second terminal of a second electrical component connected by a circuit line, described in the auxiliary device-based wiring information stored in the storage unit with terminals connected to both ends of an electrical wire connecting the first terminal of the first electrical component and the second terminal of the second electrical component, described in the region-based connector/wiring information stored in the storage unit, wherein the control unit is further configured to refer to first region-based connector/wiring information to specify a first certain electrical wire and a second certain electrical wire of which one end is connected to the other end of the first certain electrical wire which are described in the first region-based connector/wiring information, and regard the first certain electrical wire and the second certain electrical wire as a single electrical wire by virtually fitting the first certain electrical wire and the second certain electrical wire, refer to first auxiliary device-based wiring information to specify a first terminal of a first electrical component and a second terminal of a second electrical component connected by a circuit line, described in the first auxiliary device-based wiring information, after regarding as the single electrical wire, refer to the first region-based connector/wiring information to specify a first electrical wire of which one end is connected to the first terminal of the first electrical component described in the first region-based connector/wiring information, and determine whether a terminal connected to the other end of the first electrical wire is identical to the second terminal of the second electrical component.