Numerous arthropods were found on the medicinal plants in the predator and ectoparasites role. The predator and ectoparasitic is one of them. They have main role in equilibrium in natural ecosystems. Due to using their extractions in medical treatments, were limitations in pesticides applications. So natural enemies especially parasitic and predatory mites are good potential in natural equilibrium and decreasing phytophagous agents e.g. spider mites. Therefore the collecting and identification of predatory and ectoparasite mites are very important. This study was carried out in order to collecting predatory and parasitic mites of fauna of some medicinal plants in Hamedan region in 2008-2009. In this study were identified 15 species from 12 families. The scientific names of mite species are bellow: Anystis baccarum L., Tydeus caryae Khanjani & Ueckermann, Stigmaeus pilatus Kuznetzov, Eupalopsellus ueckermanii Khanjani & Masoudian, E. hamedaniensis Khanjani & Ueckermann, Erythraeus (Zaracarus) hamedanicus Khanjani et al., E. (Erythraeus) mirabi Khanjani et al., E. (E.) garmsaricus Saboori et al., Allothrombium ovatum Zhang & Xin, Raphignathus hegmatanaensis Khanjani &Ueckermann, Cunaxa careolus Berlese, Spinobdella cornini (Baker & Balock), Neoseiulus bicautus Wainsten, Lasioseius youcefi Athias-Henriot, Vegaia nemorensis (Koch). Materials and Methods: The mites were collected from aerial parts of the Asteraceae family as follows: Yarrow, Cartamus, Feverfew, Chickory, Prickly Lettuce and Thistle, by shaking them over white tray. Then mites were mounted by Hoyer’s medium and dried in oven 50 ºC. After providing permanent microscopic slides, they have identified by an Olympus BX51 microscope and valid taxonomic keys. All specimens are deposited in the Collection of Acarology Laboratory, University of Bu-Ali Sina, Hamedan, Iran. Results: In this study were identified 15 species from 12 families. The scientific names of mite species are presented below: Anystis baccarum L
