Purpose: The purpose of this study was to identify the degree of critical thinking disposition of nursing students and the factors influencing critical thinking disposition. Method: The subjects were 406 nursing students attending at one university who have been taught by the integrated nursing curriculum. Data was collected by a self-administered questionnaire from Nov. 11, 2007 to Nov. 30, 2007. The survey tool developed by Yoon(2004) was used. Data was analyzed by t-test, one way ANOVA and Scheffe test using SPSS Win 12.0. Result: The mean score of critical thinking disposition was 3.57. The sub scales of critical thinking disposition were statistically significant in regard to grade, age and character of subjects. Overall mean score of critical thinking disposition and its sub scales were statistically significant according to the degree of satisfactory of majoring nursing, reason of choosing nursing as a major and satisfaction on integrated nursing curriculum. Conclusion: Critical thinking ability is very important in various nursing situations. Integrated nursing curriculum was developed to improve critical thinking ability of nursing students. It is recommended that evaluation on the goal attainment of the integrated nursing curriculum needs to be monitored continuously.