Purpose: The purpose of this study was to develop an exercise intervention program based on stage of exercise using the Transtheoretical Model (TTM) for patients with type 2 diabetes mellitus (DM). Method : A methodological research design was used to develop the exercise intervention program based on stage of exercise using TTM. Result: The exercise intervention program consisted of theoretical background and goals of program, assessment tool for stage of change, and an exercise intervention program based on stage of exercise. Details for the exercise and a glossary are included, Conclusion : The exercise intervention based stage of exercise can apply for DM patients who are in any stages properly.