A wire harness continuity inspection method according to the invention includes: a referring step of referring to 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, which are described in the auxiliary device-based wiring information; a first specifying step of referring to 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 region-based connector/wiring information; and a first determining step of determining whether the terminal connected to the other end of the first electrical wire is identical to the second terminal of the second electrical component.