A child's growth is accompanied by a series of changes, among which is the transition from kindergarten to elementary school. Such a change has a diverse range of effects on the child and the educator, the child's family, professional colleagues and the teacher have an important role in overcoming obstacles. Through this paper, the role of the teacher in the mentioned process will be studied in particular, as well as the activities, ideas and procedures that teachers use or could use in the process of the child's transition to elementary school. The aim of the paper is to review the perspective and role of the teacher in that process, to open new perspectives for all future collaborations for the purpose of an easier, more pleasant and successful transition of the child, who is at the center of that process and for whose well-being is important to make teachers aware of their role in it. Also, highlight the potential challenges that arise in the transition process, and propose activities that can be used to overcome them more easily. Also, emphasize the importance of quality education, mutual communication and respect for all participants in the process. By talking to teachers, educators and professional associates who have been through the process of transitioning children from kindergarten to primary school, the goal is to share the real experiences of teachers, their views and advice. Finally, to see if teachers in Croatian practice are represented in this cooperation to the extent that they should be, and in conclusion to give a real display of the importance of the teacher's role in the transition process.