This study was conducted to investigate the status of intestinal parasite infections and determine some related factors in school children aged 6-9 years in some poor rural communities in Bac Giang, Hung Yen and Bac Ninh provinces. Intestinal parasites in stool were examined by Kato-Katz method. The results showed that among 308 school children from 6 to 9 years of the six schools, the prevalence of children infected between 1 and 2 kinds of intestinal parasites was 54.5 percent (in which, 28.9 percent in Bac Giang, 70.9 percent in Hung Yen and 64,4 percent in Bac Ninh). Intestinal parasite infection was significantly associated with anemia (OR = 2.74, P0.001). Intestinal parasitic infections are the public health problems of primary school children aged 6-9 years old in the poor rural areas. Thus, interventions to prevent anemia in primary school children will be successfully if control the parasite infection and determinant factors of anemia.