The materials are 50 sialographies in 50 patients of the National Medical Center for last 5 years (1968-1973)and 50 normal parotid sialographies in 26 patients of 57 Evacuation (army) Hospital for last several months(1974.5-1974.10) in Korea. Total is 100 sialographies in 76 patients. The patients in army hospital were selectedat random for normal study, but the patients with past or present disease history on salivary glands wereexcluded. The method is hyrostatic (70-100cm H2O) or manual with catheterization (1.60 polyethylene catheter) and60% urografin 1-3ml as contrast. The target-film and skin-film distances are 70cm and 3cm. 84% (42 cases) of 50N.M.C cases were positive findings radiographically. the contents of these are 17 chronic non-specificinflammations (parotid 9, submax. 8), 17 neoplasms (parotid 15, submax. 2), and 8 stones (submax. 5, suling.3).Mixed tumors (8 cases) are highest incndence in neoplasms (17 cases), (table 3,4,5). The measurement of the 50normal parotid sialographies in 26 patients of the 57 Evacuation (army) Hospital revealed main duct diameter (a)1.06+0.11 (standard deviation)mm, duct length (1) 5.64+0.61cm, lateral displacement of the duct (d) from mandibleramus in straight P-A view 1.27+0.32cm, number of first branches of the main duct (br.) 7.6+1.9br., and glanddimensions of anteroposterior (w) 4.94+0.99cm, superoinferior (h) 4.75+0.72cm, medialolateral (W')3.30+0.79cm(table 6) Parenchmal lesions were better picture with distention slalographies and ducts lesions werebetter pictures with hydrostatic silographies. During or after the examinations non-significant complications werenoted.