Purpose: This study was conducted to identify effects of debriefing based on the clinical judgment model for nursing students on their knowledge,skill performance, clinical judgment, self-confidence and learner satisfaction during simulation based end-of-life care (ELC) education. Methods: Simulation based ELC education was developed in six steps as follows: selection of learning subjects and objects, development oflearning tools, a trial run of simulation-based education, students’ skill training, and evaluators’ training. Forty-eight senior nursing students (25 inthe experimental group and 23 in the control group) participated in the simulation-based ELC education using a high-fidelity simulator. Debriefingbased on the clinical judgment was compared with the usual debriefing. Results: ANCOVA showed that there were differences in knowledge(F=4.81, p=.034), skill performance (F=68.33, pqqqlt;.001), clinical judgment (F=18.33, pqqqlt;.001) and self-confidence (F=4.85, p=.033), but no differencein satisfaction (t=-0.38, p=.704) between the experimental and control groups. Conclusion: This study found that debriefing based on the clinicaljudgement model is effective for supporting nursing students for reflecting on clinical judgment and improving their diverse competencies incomplex clinical settings such as ELC.