Monodisperse LiCoO2 hollow particles were prepared by membrane emulsification using ordered anodic porous alumina. An aqueous solution containing metal salts and a chelating agent was used as the dispersed phase for the emulsification. The uniform-sized emulsion droplets formed by membrane emulsification were solidified on a filter membrane by drying in air. LiCoO2 hollow particles were formed by calcination of the precursor particles. The obtained monodisperse particles are expected to be suitable for use as an active cathode material for Li-ion batteries because of their large surface area and uniform size.