A method of manufacturing a liquid crystal display panel includes preparing thin substrates for upper panel and lower panels, and first and second support substrates for the thin substrates, attaching the thin substrate for the upper panel to the first support substrate, and attaching the thin substrate for the lower panel to the second support substrate, forming the upper and lower panels by forming members for the display panel on surfaces of the respective thin substrates in a state where the thin substrates are attached to the first and second support substrates, respectively, bonding the upper and lower panels, and separating the first and second support substrates from the upper and lower panels, where at least one part of a border of a surface of each of the first and second support substrates, where the surface is attached to the upper or lower panel, is tapered.