A circuit board includes first wiring, a first wiring arrangement region, first unit inspection sections, second wirings, a second wiring arrangement region, and second unit inspection sections. The first wirings are arranged regularly. The first wirings are arranged in the first wiring arrangement region. The first unit inspection sections are arranged in the first wiring arrangement region at given intervals and are a target for inspection images. The second wiring arrangement region is adjacent to the first wiring arrangement region. The second wirings are arranged in the second wirings. The second unit inspection sections are arranged in the second wiring arrangement region at given intervals and are occasionally the target for the inspection images. The second unit inspection sections are arranged in the second wiring arrangement region in an identical pattern.