This study examined the frequency of university students with self-esteem level at first. Moreover, the difference between male and female and the difference between achiever and non-achiever students were examined with respect to self-esteem. Also the relationship between self-esteem score of university students and stressful life events was examined. Three hundred thirty one university students from different grades and departments of Middle East Technical University have been participated in this study. Rosenberg Self-Esteem Scale (SES), Life Events Inventory for University Students (LEIU) and four-question demographic information form were used for this study. Factor analysis for LEIU was made for this study. At the end of the factor-analysis, three factors were identified. These were called as self-related anxiety/problems / environmental, adjustment, family events/problems / and academic events/problems. To examine the percentage of students with high and low self-esteem, frequency of the participant was calculated. In addition, independent samples t-test was applied to investigate the difference between male-female and achiever-non-achiever students on self-esteem, while Pearson product moment correlation was applied to examine the relationship between self-esteem and stressful life events. It was found that there were 302 students (88.6 %) with high self-esteem level, while there were 39 students (11.4 %) with low self-esteem level. According to independent samples t-test results, it was found that achiever students&amp / #8217 / self-esteem score was higher than non-achiever students whereas there is no significant difference between male and female on the self-esteem score. Finally, it was found that there is a significant relationship between self-related anxiety/problems, environmental, adjustment, family problems and academic events/problems and self-esteem.