Diabetes Self Management Education (DSME) which integrates the four pillars of Diabetes Mellitus Management independently emphasize the behavioral interventions which help people with diabetes to change their lifestyles in terms of diabetic self care. The implementation of DSME related to the continual education covers the basic concepts of DSME itself, diet time arrangement, physical activity, foot care and exercises for people with diabetes. The objective of this research was to find out the effectiveness of Diabetes Self Management Education (DSME) group method on the type 2 Diabetes Mellitus Outpatient at Public Health Center Gorontalo Regency. The design of this research was Quasi Experimental Design with Pre-Test and Post Test. The samples were taken by using cluster sampling technique. The number of samples were 24 which was divided into two groups, 12 people of control group and 12 people of intervention group. The data were analized by using paired t test. The result of this research showed that there were significant differences of diabetic self care in type 2 Diabetes Mellitus patients after the implementation of Diabetes Self Management Education (DSME) group method with p value = 0,00. In conclusion, the program of DSME that related to diabetic self care can be applied systematically and sustainably as the nursing intervention to patients by using proper media and method of education. By applying the method and media properly, people with diabetes can control and prevent the type 2 Diabetes Mellitus complication.