Abstract: Family-based aggregation analysis on intestinal parasite infection was pursued according to an investigation involving a total of 772 families (2826 persons) in Tian-jin.The result indicated that family aggregation for Ascaris lumbricoides,Trichuris tri- chiuras, Enterobius vermicutaris (P0.01), while no family aggregation was exhibited ior Entamoeba histolytica, Entamoeba coli, Giardia tamblia, hookworm (P0.06). The latter case was attributed to the diminution of using fecal manure.The data provided in this paper revealed the situation of several family-aggregated parasitoses in a municipality, demonstrating the importance of parasite control in urban districts.