Objective: The aim of this study is to determine the prevalence of intestinal parasites which are of great importance in immune deficiency in dialysis patients. Methods: This study was conducted in the Parasitology Laboratory, Dursun Odabaş Medical Center, Van Y?z?nc? Yıl University between the dates, June 2010 - February 2011. Fifty six women and 44 men having chronic renal failure and entering dialysis, totally stool samples of 100 patients as the test group and the stool samples of 30 healthy people as the control group were examined parasitologically through the native-Lugol, flotation and modified acid fast staining methods in this study. Results: In the study, in 44% of the stool samples of the dialysis patients were found parasite species. Cryptosporidium sp. was found only in one of the stool samples of the control group of 30 healthy people. Cryptosporidium sp. was found as 32% and Cyclospora cayetanensis as 1% of the patients. A statistically significant variance was found between the mean frequency of Cryptosporidium sp. and chronic renal failure (p<0.001). Conclusion: Consequently, it was certain that Cryptosporidium sp. and C. cayetanensis must be primarily considered in dialysis patients suffering from diarrhea, abdominal pain, nausea, constipation, loss of appetite.