During 1983.3-1986.8 CT findings of 35 cases of parotid lesions were retrospectively reviewed together with their surgical and histologic findings to determine its value in 3 points. 1) Anatomical localization of the lesion 2) Differentiation between benign and malignant tumors 3) The relationship with the facial nerve And also CT Sialography was done in 4 cases. The results were as follows. 1) The age distribution was 1 month-66 years of age. Male to female ratio was 4:3 2) The most common benign tumor was pleomorphic adenoma (15%) and the most common malignant tumor was carcinoma(15%) 3) Anatomical localization was possible in all cases by noticing the direction toward the fat plane was displaced. 4) Invasion to facial nerve was determined by obliteration of the normal "bull"s eye" 5) Malignancy was rather suggested when the lesion shows ill-defined border necrotic central low density lymphadenopathy and ductal obstruction without a stone. Most of the diagnostic deffculties were in cases of inflammatory mass lesions and sialography was more useful than CT in such cases. in such cases.