The invention provides an active energy ray-curable composition containing porous silica particles (A) and multifunctional (methyl) acrylate (B) having hydroxyl, wherein the porous silica particles (A) are obtained by adding a mixed solution of 4-alkoxy silane, alkylamine and alcohol (solution I) into a mixed solution (solution II) of ammonia, alcohol and water, obtaining silicon dioxide particles through the hydrolyzation and condensation reaction of the 4-alkoxy silane, and removing the alkylamine from the silicon dioxide particles. In addition, the invention further provides various films such as protective films and optical films, for the films such as protective films and optical films, the active energy ray-curable composition is coated on the surface of the films to cured films, so that the films can be excellent in anti-bonding property without reducing the transparency. Therefore, the films can be high in transparency and excellent in anti-bonding property.