Toxoplasma gondii is an intercellular one - cell parasite belonging to the sporozoa sub- branch, with a world-wide incidence. In this descriptive analytic study 452 pregnant women referred to health treatment centers of khoramabad city were selected rondomly. Then blood sample of each patient was taken and after primary stages, blood samples were tested using indirect immunofluorescent antibody (IFA) method.Results showed that in 44.2 percent of them there existed antibody titers of 20, 40, 80, 160, 400, 800, 1600 and 3200 against antigen of T.gondii parasite in 63.5 ,6,4,2,19,4.5,0.5 and 0.5 percent of them respectively. Numerous information was gathered through variables recorded in questionnaire including: age, occupation, spouse occupation , place of living, number of childbirth, age of pregnancy, history of disease, history of abortion, manner of vegetables consumption, manner' of meat consumption, kind of consumer water, But no significant relation was observed between these variables and toxoplasma gondii.