Purpose: The purpose of this study was to test the effects of tailored diabetic education on blood glucose control and self-care for patients with type 2 diabetes on insulin therapy. Methods: The participants were 60 patients (experimental group: 30, control group: 30) with type 2 diabetes on insulin therapy. The patients were being seen at a university hospital in Seoul, Korea. Group diabetic education and tailored diabetic education were given to the experiment group while group diabetic education only was given to the control group. Data were collected before and three months after the education. $X^2$ test, t-test, and ANCOVA were used to analyze the data. Results: No significant differences in postprandial (PP2hrs) glucose and HbA1c levels were found between the two groups. Participants in the experiment group showed statistically significant differences in the area of self-glucose test, management of insulin injection, and life style change compared to those in the control group. Conclusion: The results indicate that tailored education for patients with diabetes on insulin therapy improve self-glucose test, management of insulin injection, and life style. Therefore it is suggested that tailored education can be applied in diabetic education to improve self-care.