Kolàšeg is locatedat about 6 kilometers southeast of the modern town of Guilan-eGharb in west of KermanshahProvince. The site lied in between Mià-khesh and Tagh-tooghmountains; the KolàšegRiver was passing through the valley during the near past, Locating in the reservoir of the Kolàšegdam and in order to do rescue excavation,the site was excavated by the IranianCenter for Archaeological Research (ICAR) expedition for a season in 2004. The site is composed of two parts; a residential area and a cemetery on a platform locating at the foothill of the Mià-kheshMountains. The residential part is situated downward, at the south of the graveyard close to the KolàšegRiver located in the south. We could not excavate the whole site because of large span of the site and time limitation;especially the cemetery of the sitehas almost remained intact. The excavationmethod leads to revealing the vast architectural remains. The architecture was made of stone both foundation and walls. The excavation has revealed us a large number of noticeable abject related to the Iron Age III such as Pendants, Armament, Potsherds and Glass sherds and Objects; of them, are Fibulas and a Cylindrical Seal which are very important for dating the site.The comparative study of the material has also proved that the site can definitely be related to the Iron Age II, III relying on some marks on the Assyrian appearance in the region by the given time.