Trichuris (whipworms) is a genus of parasite worms from the roundworm family Trichuridae. Trichurias is a soiltransmitted helminthiasis and belongs to the group of neglected tropical diseases, affecting about 604 million people globally. The genus Trichuris includes over 20 species, which infect the large intestine of their host. From August 2013 to May 2014, 275 sheep were analyzed to confirm the presence of gastrointestinal parasitic infection. 128 (46.5%) samples were found positive for Trichuris spp. Totally, 489 Trichuris spp. were found - 63.5% (n=311) female and 36.4% (n=178) male. Worm burden of Trichuris in intestine was 1 to 29. We have used the light microscope for the diagnosis of the species by detecting the spicular sheath. We detected 49% (n=243) T. ovina, 28% (n=135) T. discolor, 17% (n=83) T. Skerjabini, 5% (n=24) T. barbetonensis and 1% (n=4) was unknown. The results show that major nematodes of large intestine belongs to genera Trichuris.sp with high prevalent in the areas of Khorasan. Further studies on the economic importance of

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