Objective: This study was intended to compare the effects of nutrition education on glycemic control and dietary managements of patients with type 2 diabetes Mellitus (DM)patients. Methods: Two types of education which were lecture-oriented and practice-oriented, were conducted for DM patients visiting public health centers. Fasting blood glucose, HbA1c and antropometric measurement were compared and nutritional knowledge awareness was measured before and after nutrition education Results: Fasting blood glucose level was significantly decreased in practice-oriented education (POE) group with 4 weeks of education. However, it tended to increase again 4 weeks after completion of education. Fasting blood glucose level was maintained within acceptable range 12 weeks after the education in compliance group, whereas only up to 8 weeks after in non-compliance group in POE. By contrast, fasting blood glucose level was maintained within acceptable range up to 4 weeks after the education in compliance group in lecture-oriented (LOE) group. In POE group, fasting blood glucose level was maintained within acceptable range from 4 weeks to 12 weeks after the education regardless of the diabetic duration. However it was maintained only for patients with 2-6 years of diabetic duration in LOE group. There was a significant decrease of energy intake in both groups. Carbohydrate intake was significantly decreased only in POE group. Dietary intake of grain and starch group was significantly decreased both in LOE and POE in terms of food exchange unit.Correct answers on nutrition knowledge increased from 47.6% to 83.8% in POE group, and from 39.4% to 62.9% in LOE group Conclusion: It is recommended that developing POE programs in conjunction with training and allocating nutrition professionals need to be urgently considered for diabetic patients, visiting public health centers, to improve their dietary behavior and maintain glycemic control within desirable range.