THe positive correlativity of fecal examination and soluble antigen from two kinds of adult clonorchis sinensis was nearly 90%. Results of field survey showed that there was no obvious difference between the positive rates of fecal examination and that of ELISA. The positive correlativity was 89. 3%, and the negative correlativity was 92. 8% with 2309 cases. There was close relationships between positive correlativity and the clonorchis sinensis egg density (amount of egg/per gram fece) of the infected people. The positive correlativity of seriously infected people was as high as 97. 9%. while the positive correlativity of those with lighter infection was only 61. 1%. The more serious the infection, the serum antibody titers. was much higher.