The aim of my thesis was to get acquainted with the professionalism of teachers and how they are formed through self-reflection. I wanted to see if the teacher self-evaluate, which method they use and how often are they self-evaluating.The first part focuses on the teacher and her professionalism. There I am decribing her teaching skills and competencies. I am defining the basic concepts, which are self-assessment and self-reflection. Further, self-reflection is divided into different aspects.In the next phase, are described specific methods of self-reflection. Methods of observation, self-reflective questionnaire, self-reflective conversation self-reflective diary and portfolio of kindergarten teacher. In the fourth part, which is practical, I am dealing with the evaluation of self-assessment questionnaires focused on self-evaluation of kindergarten teacher. Respondents were selected kindergarten teachers from different parts of the Czech Republic.