Adhesion forces, surface energies and compositions of polyester resins blended with different coupling agents were measured by 180 ℃ peel test, contact angle and XPS measurements respectively, in order to investigate the effect of coupling agent on the adhesion and surface properties. In the case of resin-B, which contains aromatic and aliphatic diacid, C-1(n-phenyl-gamma-aminopropytrimathoxysilane) enhanced the adhesion force whereas the others did not. Resins-A showed very small adhesion forces for all the coupling agents. For resin-B, the surface energy results were consistent with adhesion results.