The invention has for its object the provision of a phase difference control component that, albeit comprising a phase difference control layer formed of a polymerizable liquid crystal, enables a given spacing to be maintained between opposite substrates, etc. A phase difference control component 1 comprises a multilayer structure wherein a phase difference control layer 3 formed of a liquid crystal polymer is stacked on a substrate 2, and a plurality of prismatic, cylindrical or other columns is provided on the phase difference control layer 3. The columns are formed of a material obtained by curing an ionizing radiation-curable resin composition. With the multilayer structure, the object of the invention can be accomplished. A black matrix, a color filter layer or the like may be interposed between substrate 2 and phase difference control layer 3, and an electrode and an alignment film may be provided on the phase difference control layer.