To study the relationship between the prevalence of intestinal parasitosis and the level of immunodeficiency in HIV-infected individuals. The material for the study was the results of the detection of intestinal parasitosis in 65 people living with the HIV. In the patients often was found Giardia lamblia and Blastocystis hominis. In patients with intestinal parasites, severe immunosuppression (CD4 <200 c/ml) was more common than in patients without them. The detection of intestinal parasitosis in patients with HIV infection can be used as a marker of immune suppression. Common intestinal parasites among HIV-infected patients are Giardia lamblia, Blastocystis hominis, Entamoeba histolytica, and Ascaris lumbricoides. There is a correlation between the prevalence of intestinal parasitosis and immunodeficiency.