Diabetes mellitus is a metabolic disorder characterized by an increase in blood glucose levels. Changes in blood glucose levels in type II diabetes mellitus patients can be influenced by many factors, one of which is changes in stress level. Patients with diabetes mellitus type II need not only pharmacology treatments but also non-pharmacology treatments and complementary therapy to reduce their stress. Music therapy is one type of complementary therapy. The purpose of this study was to examine the effect of saluang, which is a form of Indonesian traditional music, on reducing the stress of type II diabetes mellitus patients. The design of this study was quasi-experimental one-group pretest-posttest. There were 20 participants, who were all diagnosed as type II diabetes mellitus patients. Data were collected using the Depression Anxiety Stress Scale (DASS). Data were analyzed using paired sample t-tests. The average stress level of the type II diabetes mellitus patients obtained before receiving saluang music therapy was 22.5 (SD 5.0), and after receiving saluang music therapy the value was 14.5 (SD 2.3); this difference was significant (p < 0.01). Therefore, we can conclude that Indonesian traditional music can be used as therapy to reduce the patient stress level. So, it is recommended that saluang be used as a complementary therapy for type II diabetes mellitus patients.
 Keywords: Indonesian traditional music, saluang, stress, type II diabetes mellitus