An object of the present invention is to prevent irregular burrs from being created on the surface during cutting due to the cutting line crossing over the sealing material when a liquid crystal display panel is separated from a mother substrate. When the sealing material 30 is applied using a dispenser, the starting point 31 and the finishing point 32 of the sealing material are at points inside the cutting line 40, and thus, the cutting line 40 is prevented from crossing the sealing material 30 when the liquid crystal display panel is separated from a mother substrate 100. As a result, the breaking line 42 runs straight down from the scribe line 41, creating a clean cross section. Even though the starting point 31 and the finishing point 32 of the sealing material 30 are at points inside the liquid crystal display panel, the starting point 31 and the finishing point 32 are formed so as to be contained within the black matrix in frame form in the periphery, and thus, the display region is not affected.