The purpose of the research is to determine whether the critical thinking tendencies of Turkish teachers differ according to various variables. The research group contains 229 Turkish teachers working in Turkey's public schools. In the research survey method was used, which is selected among descriptive research methods. The tendency of teachers was measured by a scale called "The Marmara CTT Scale (CCI)" developed for teachers and administrators by Özgenel and Çetin (2018). The scale involves 6 factors, 28 items and the general reliability coefficient was found to be 0.91. In the end of the research, it was seen that Turkish teachers were at good level of CTT. It has been determined that there is no significant link between the gender, education level and professional seniority of Turkish teachers and their CTT. Furthermore, it was observed that the frequency of reading had an effect on the CTT of Turkish teachers. Accordingly, as the frequency of reading of the participants increased, the level of their CTT increased, too. The findings were discussed in the light of the studies in the literature and at the end, various recommends were given to the education stakeholders.