A manufacturing method of a liquid crystal panel 10 includes a panel manufacturing process, a substrate detachment process and a reuse-panel manufacturing process. A first liquid crystal panel 10A and a second liquid crystal panel 10B, which differ from each other in position of a sealant portion 20A, 20B to be formed thereon, are manufactured by the panel manufacturing process. Substrates 17, 18 are detached from a defective liquid crystal panel, i.e., from any one of the first liquid crystal panel 10A and the second liquid crystal panel 10B having a defect, by the substrate detachment process. The reuse-panel manufacturing process manufactures a third liquid crystal panel 10C by attaching the substrate 18A detached from the first liquid crystal panel 10A and the substrate 17B detached from the second liquid crystal panel 10B to each other. The reuse-panel manufacturing process includes a sealant-portion forming process that forms a third sealant portion 20C on the substrate 18A detached from the first liquid crystal panel 10A. The third sealant portion 20C is located to differ in position from both of a first sealant portion 20A on the first liquid crystal panel 10A and a second sealant portion 20B on the second liquid crystal panel 10B.