Self-management is essential in preventing complications among patients with Diabetes Mellitus. The behaviour of patients to implement Diabetes Self-Management (DSM) is influenced by several factors which needs further study. This descriptive study aimed to identify factors contributing to DSM among patients with Type 2 Diabetes Mellitus (DMT2). 94 respondents were recruited using randomized sampling obtained from an inpatient unit in one hospital in West Java province. Self-rating instruments were used to identify demography data, knowledge about DSM, self-efficacy scale, and DSM questionnaire. Descriptive analysis was conducted to explain demography data, knowledge, self-efficacy and DSM. Findings indicated respondents demonstrated moderate level of knowledge (M=7,53), and self-efficacy (M=34,8), and high level of DSM (M=89,28). Post-hoc analysis demonstrated a significant relationship between age (r=-0,209); p=0,043), education level (p=0,008), and self-efficacy (r=0,214; p= 0,038). No significant relationship was not identified with DSM (r=0,317; p=0,187). It is concluded that age, level of education, and self-efficacy were contributed to DSM.