We reviewed the records of randomly selected 320 diabetic out-patients at Eul-ji Hospital from April 1981 through March 1983. Fasting blood sugar (FBS) of 140 mg/dl or more was taken as a criteria of diabetes according to the report of National Diabetes Data Group. The results are as follows : 1. Mean age of study group was 50.8 years-old and the FBS mean value was 222.4 mg/dl. 2. There was no significant difference of FBS values of tuberculosis and non-tuberculosis patients. 3. Prevalence of pulmonary tuberculosis evaluated by chest films 13.4 percent in diabetes patients. This value is lower than those of other studies but higher than that of urban population in Korea (p < 0.05).