p-(2-Methacryloyloxyethoxy)-N-(4-stilbenzylidene)aniline 6 was prepared by the reactions of methacryloyl chloride with p-(2-hydroxyethoxy)-N-(4-stilbenzylidene)aniline 5. Monomer 6 was polymerized with radical initiators to obtain polymer with p-oxy-N-4-(stilbenzylidene)aniline, which is presumably effective chromophore for second-order nonlinear optical applications in the side chain. The resulting polymethacrylate 7 showed a thermal stability up to 300 degrees C in TGA thermogram, and the T-g value obtained from DSC thermogram was 166 degrees C, which is acceptable for NLO device applications.