Abstract: The present paper reports on the electrophoretic patterns of antigens prepared from the cyst fluid and the scolex-cyst wall complex of C. cellulosae. The band model in PAGE and SDS-PAGE and the method for detecting the immunological antigens against rabbits, hyperimmune sera were investigated. It was found that the antigenic composition of C. cellulosae was highly complex. In scolex-cyst wall complex, we found 13 bands in PAGE and 22 bands in SDS-PAGE stained by Coomassie brilliant blue R-250, and 11 IE components against corresponding rabbit's hyperimmune sera. The cyst fluid showed 10 bands in PAGE and 16 bands in SDS-PAGE stained by Coomassie brilliant blue R-2SO, one band stained by PAS and another by Sudan black B. 14 IE antigenic components in cyst fluid were demonstrated. The cyst fluid is rich in protein, glycopro-tein and lipoprotein, and contains at least one major serologically antigenic component. Both the cyst fluid and scolex-cyst wall complexes contained heat-resistant antigens, and .shared 3 common components.