Chemiluminescence property of bis(2,4,6-trichlorophenyl) oxalate-hydrogen peroxide-dyestuff system was examined in the presence of polymer particles. The chemiluminescence of the system was enhanced through an interaction between xanthene dyestuffs and polymer particles. For example, when using erythrosine B, the chemiluminescence intensity in the presence of the particles was about 20 times larger than that in the absence of them. It was clarified from preliminary experiments that the enhanced chemiluminescence with the particles was useful for the determination of H2O2 and dyestuff-labeled D-glucose.