Abstract: A single cross-sectibnal survey was conducted by IFAT with both P., falciparum and P. cynomolgi antigens in five different endemic areas of malaria in 1983. Parasito-logical examination was done simultaneously for comparison. Antigen slides containing either 149.5 schizonts of P. cynomolgi or 124.4 schizonts of P. falciparum per field (10 X 40) were used to detect the antibodies against malaria by IFAT at the same time. The results of serological assessment coincide well with those of blood examinations, the positive rates of antibodies and the GMRT level being proportionally related to the malaria endemicity and the transmission intensity of P.falciparum and; P. vivax in the areas studied. It suggests that both antigens for IFAT, could be used in sero-epidemsological investigation to determine the endemicity of falciparum and vivax malaria in areas of coexistence.