The monograph summarizes the authors ' own long-term research and scattered data available in the literature on endoparasites of wild ungulates. The book describes the species composition of endoparasites of 10 ungulates: saiga, jeyran, siberian mountain goat, argali, ustyurt urial, siberian roe deer, bukhara deer, elk, wild boar and kulan, which are valuable aesthetic objects for tourism and sport hunting, as well as increasing the number of animals. Data on the fauna of endoparasites in three groups of saiga: betpakdala-arys, ustyurt and ural populations and dynamics of changes in the fauna of parasites by season in different age groups of antelopes are presented. Parasites of bukhara deer, elk, kulan, ustyurt urial and karatau argali were studied for the first time in Kazakhstan. The monograph analyzes the ecological basis of parasite exchange between wild and domestic ungulates and its influence on epizootic diseases in wild and domestic animals. A justification is given for the phenomenon of parasite transport in space and the pressure of invasion flows on the dynamics of ungulate populations. Keywords: parasites, protozoa, helminths, saiga, jeyran, siberian mountain goat, argali, ustyurt urial, siberian roe deer, bukhara deer, elk, wild boar, kulan, Betpak-Dala, Barsa-Kelmes, exchange of parasites.