[Problem] To provide a manufacturing method capable of manufacturing, with high yield, flexographic printing plates with excellent thickness precision even when large as well as excellent precision in the positioning of the pattern formed by simplification of the structure or combination of the original divided pieces and a liquid crystal display element manufacturing method using a flexographic printing plate manufactured using said manufacturing method. [Solution] A flexographic printing plate manufacturing method comprises a step for gluing together multiple divided pieces (4) on the pressure sensitive adhesive surface (10) of a pressure sensitive adhesive sheet (11) with spacers (13) therebetween, gluing a reinforcement sheet (2) thereon, removing the pressure sensitive adhesive sheet (11) and the spacers (13), filling a photosensitive resin composition in the gaps where the spacers (13) were removed and curing by irradiating active light to unify the multiple divided pieces (4). A liquid crystal display element manufacturing method comprises a step for forming a liquid crystal alignment layer by flexographic printing using said flexographic printing plate.