Abstract Introduction:Today despite all the advances made in all scientific fields specially in medicine and health sciences, still parasitic diseases are considered as a major health-economic problem in most countries especially in the developing countries thereby inducing some troubles for these countries including a large loss of human resources, high cost, and spending much time for eradicating and controlling parasites. Methods:Sampling method was conducted through the convenience design of sensus including all the visitors to Central Laboratory and Shahid Sadoghi Hospital laboratory. Most of the fecal samples were taken with a direct method (physiologic serum and lugol) and were examined by light microscopy. Results:Out of the total of 33096 fecal samples examined, 17481 were relating to men (52%) and 15615 to women (48%) out of all samples, 624 cases (1.8%) were positive and among the positive cases 380 were pertinent to men (60.8%) and 244 to women (39.2%). There was a significant relationship between contamination and sex. Most contamination rate was related to Giardia (43.4%) and Blastocystis hominis (40.1%) respectively. Conclusion:The findings of this study indicate that in Yazd with the hot and dry weather, due to the prevalence of intestinal parasites, health level is low and compared to the past years has a significant reduction but as in other parts of the country the highest contamination outbreak is related to the younger groups and Giardia and Blastosystis hominis. Keywords:Intestinal Parasites, Protozoa, Worm, Yazd