This study was alalyzed 130 cases of silicotuberculosis impressed by clinical pictures at Ewha Womans University Hospital and Industrial Rehabilitation Center from October 1981 to April 1982, with special emphasis on radiologic findings. 130 cases of silicotuberculosis consisted of 42 cases (32.3%) of 40-49 year of age group, 110 cases (84.6%) of quarrymen, 77 cases(59.2%) of 10-19 year of working group. Accoording to UICC (International Union Against Cancer)/Cincinnati classification, radiologic findings showed 40.8% of Category 2,25.4% of Category 3,20.8% of Category 1 with high frequency of q-size(46.2%) and r-size(33.8%), and 17.4% of Large opacities (Category A, B & C). suggestive tuberculous lesion was noted in upper lung field with frequency of 84.5%. So, this study showed significant relationship between the degree of opacities and year of age, kind of job, and year of working. The conditions and site of predilection are also found. Radiologically noted major complications are emphysema, pleural adhesion, mediastinal adhesion, diaphragmatic adhesion, bronchiectasis, obstructive emphysema, pleural effusion, cor pulmonale, pneumothorax in order. Most frequent radiological finding to emphasize tuberculous lesion was new infiltration in upper lung field(45.4%), but it had only 22.0% of AFB positive rate. Otherwise, finding of cavity formation was less frequent(25.4%), but had high AFB positive rate(60.6%). So, in cases of suspicious silicotuberculosis, detection of the cavitary lesion was most important in confirmatory diagnosis.