Leadership Model of Nurse' Unit Manager and Nurse Retention: the Staffs' Perception. Nurse retention is important to maintain the stability of nursing workforce. But, the high nurse turnover indicates low nurse retention in RSUD X at Jakarta. Other sides, leadership contributes to nearly every activity within organization. The research aims to determine the relationship of nurse unit manager's leadership models from the viewpoint of nursing staff to retention. The study used a descriptive correlation design. The sample consisted of 166 nurses. The result showed high retention of nurse proportion in 50%. The situational, transformational, transactional, visionary, and servant leadership model had significant relationship with nurse retention (p<0,05). The leadership model which has high correlation to retention was transactional leadership (OR= 2,881). Leadership model gives positive influence to work environment, job satisfaction, organizational commitment, and nurse performance which are finally increase nurse retention.