In order to study of different kinds of gastrointestinal helminths infestation in mice, 120 mice were collected by living traps from semidesert urbanic and rural Ares of Kashan. After identification, anesthesia and autopsy of mice the helminths of digestive tracts were collected and counted. Helminths were fixed in 10% formalin and after staining, identification were performed. Sixty eight mice (56.7%) had helminths infestation in CI tract. Six type Nematodes and 4 type Cestodes were identified. Of 120 captured mice Rhombomys opimus 12 (10%), Meriones libycus 13(11%), Raftus rattus 37(31%), Mus musculus 5(4.2%), Gerbillus nanus 1(0.8%) found infested with different species of helminths. Nematodes: Syphacia obvelata, Aspicularis tetrapetera, Trichuris niuris, Capillaria annulosa, Trichosomoides crassicuda, Gongylonema. Cestodes: Hymenolepis nana fratema, H. diminuta, Mathevataenia Symmetrica , Meggiftina for the first time Meggittina was recorded from Tran.
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