Having the abilities of self leadership and critical thinking is one of the most important factors for present students to be effective in their future organizations by contributing their organizations' quality. The aim of this study is to research the general relations between sub-dimensions of university students' self leadership and critical thinking ability levels. By using Anderson and Prussia's (1997) Self Leadership Scale and Faciona & al's (The California Critical Thinking Disposition Inventory), (1998) Critical Thinking Scale, 257 university students were surveyed, all of whom attends at their last semesters, secondary education at Cumhuriyet University, Faculty of Science and Literature. Obtained datas were analyzed by using correlation and regression methods. The analysis show that while the students' self leadership levels are high, their critical thinking levels are moderate. A positive moderate correlation was found (r=0,426) between self leadership and critical thinking. The affects of self leadership dimensions on critical thinking were examined by regression analysis. These analysis show that there is a positive and meaningful relation between constructive thinking pattern strategies and natural reward strategies. (C) 2015 The Authors. Published by Elsevier Ltd.