Introduction: Patients with a variety of intestinal parasites are estimated to be over four and a half billion people in the world.  Numerous surveys conducted indifferent areas ofIran also showed that there are intestinal parasites infections in different area of the urban and rural areas. Ofcourse, the prevalence of public health as well as its improvement as decrease dsignificantly in recent years.

 Materials & methods: The current cross-sectional study was used in a hospital in Ilam city to collect 1300 stool samples of formol-ether concentration methods and colorated with logul.

Findings: The findings of the study showed that the total number of samples (1300 samples of faeces) six type of parasites were diagnosed including protozoan Giardia lambelia , Entamoeba histolytica , Entamoeba coli, Chilomastix mesnili ,Blastocystis hominis, and intestinal worms Oxyuris. Total infected samples were 231 samples with 17%, among which 101 (43%) were the parasites Giardia, 69 patients (29%) were infected with Entamoeba histolytica and 37 (16%) of infected worm Oxyuris, 24 (10%) to E. coli, 2 (0/008%) with,Chilomastix mesnili, 6 patients (0/025%) Blastocystis hominis.

Discussion & Conclusions: Currently, parasitic infections in Iran are still one of the basic problems. In spite of the preventive measures, the prevalence of some of these diseases is high in Iran.

Also, health education and promoting health culture in the region and providing healthy foods are among the solutions to reduce parasitic infection in areas under study.