Aim: The purpose of this study was to determine the dispositions of critical thinking of nursing students and affecting factors. Methods: This cross-sectional descriptive study was conducted with Nursing Department students (n= 323) of Bulent Ecevit University. Data were collected by Personality Survey Form and The California Thinking Disposition Inventory. Data were evaluated by percentage, mean, standard deviation, student t test, one way ANOVA, Mann Whitney U test, Kruskal Wallis, and Pearson correlation analyze. Results: The critical thinking disposition mean score of the nursing students was determined as 239.70±27.24. It was found that female students (p=0.03), 2nd year students (p=0.002), students who are members of clubs (p=0.007), students who like to read the book (p=0.000) students who are going to library (p=0.03), students who have participated four and more scientific activity (p=0.002) a year were higher the dispositions of critical thinking. Conclusion: It was found that nursing students had low level the critical thinking disposition and had demographic features such as age, gender, class, like to read the book and go to library of nursing students were effect the critical thinking disposition.