A weld nut is provided and is welded to a base material through a nut insertion aperture formed within the base material. The weld nut includes a nut body that forms an appearance of a weld nut, and an insertion component that is formed to integrally protrude from the first surface of the nut body and inserted into the nut insertion aperture. Additionally, a bolt fastening aperture is formed to penetrate through the center of the nut body together with the insertion component.