Purpose: The purpose of this study was to compare the effects of CEDA (Cross Examination Debate Association) debate with those of traditional lecture education on moral judgment and ethical values using the Korean version of DIT and the ethical values. Methods: The experiment was performed for 9 weeks, from September 2 to November 12, 2010. Participants were 71 undergraduate nursing students in a nursing college, assigned to an experimental group (36 students) or a control group (35 students). The design of this study was a non equivalent control group pretest-posttest design. Results: The experimental group reported significantly higher scores of the 4 stage scores of moral judgment (t=-2.19, p=.036) and ethical values (t=3.04, p=.004) than the control group. However, no significant differences were found in the P score of moral judgment between the two groups. Conclusion: The findings of this study showed the benefits of providing a CEDA debate course for nursing ethics education. Therefore, in further studies, it is necessary to develop various teaching strategies or educational programs to improve nursing ethical values and moral judgment.