A case of the carotid body tumor is reported. The patient is a 29 year old Korean women whose chief complaint on admission is about a hen egg sized mass in right lateral portion of the neck just below the mandible angle that is well defined, smooth surfaced, movable and slowly growing for last 5 years. Right carotid arteriography reveals typical well defined tumor staining around the bifurcation area with widening and encircling of the angle between internal and external carotid arteries. (Fig. 2,3 and 4) Other laboratory study and physical examinations are non-specific. The patient rejected surgical operation and discharged after 1 week admission.