Teacher leadership can be described as taking over voluntary responsibilities during the educational processes and activities, forming independent projects, influencing his/her surrounding, and sufficiency in developing professional qualifications of his/her collagues. "Leader teacher" is a general term that applies to individuals in a variety of roles. Leadership is clearly becoming a more and more significant part of a teacher's professional life. This research was carried out in order to determine the leadership behaviours of teachers in primary schools. The data related to the research problem had been collected by literature review and interview. The questionnaires were distributed to 20 school principals and 60 teachers working at primary schools in three cities of Turkey. Having accepted the interview, 7 principals and 11 teachers were interviewed face-to-face in their schools. The answers were controlled one by one and the thoughts shared by more than 70% of the participants were added to the findings. The provided data findings based on the used techniques are given as general determinations. It is stated that teachers working at primary schools show the leadership behaviours and roles such as determining the goals, encouraging voluntary study and task, developing trust and vision, and determination at an "intermediate" level. Similarly, teachers also perceive themselves in accordance with the ideas of the managers. In this research, the willingness of teachers to train and develop themselves are found at a high level, yet their behaviours are found insufficient. Teacher meetings, student club studies, celebration activities and parents' assemblies are among the activities which teachers participate at the school level. The programs of teacher training are required to be revised again and the concept and understanding of teacher leadership are required to be reflected to the programs in this context. Teacher training environments should be constructed in the embodiment of well models that may enable teachers to show teacher leadership behaviours at schools.