Poly(benzylmethacrylate-co-methacrylicacid-co-vinylbenzylabietate) was synthesized by radical polymerization of benzylmethacrylate (BzMA), methacrylic acid (MAA) and vinylbenzyl abietate (VBA) as a photocrosslikable monomer. The composition of the copolymer was measured with H-1-NMR and FT-IR, and thermal properties and photochemical reaction of copolymers were also investigated. From these results, poly(BzMA-co-MAA-co-VBA) could be applied to binder polymers of color resist for display panel.