The profession of kindergarten teacher demands plenty of knowledge, skills and experience. One of them is communication skills which are a part of professional competencies. Considering the fact that kindergarten teachers have everyday interactions with children, coworkers and parents, it is important that they communicate in an adequate way. Assertive communication is one of communication styles which kindergarten teachers should use on a daily basis in their profession. Assertive communication is an open expression of one's own ideas and feelings towards others. With assertive communication respect is shown to the second party, and towards ourselves. With assertiveness we are standing for our rights, and at the same time we are respecting the rights of others. In this thesis the author describes different styles of communication, behaviors, and techniques of assertive communication that are useful in educators profession. Furthermore, the author lists examples of assertive and non-assertive behavior of kindergarten techer and which form of communication is used. The highlight is in the description of the behavior, not the person, because the behavior can always change. Working in a kindergarten demands communication with different types of people which often presents a challenge, because the difference in people means the difference in opinion, which can lead to conflict. In this thesis the definition of conflict is explained with constructive ways on how to resolve it with assertive techniques. The purpose of the thesis is to explore the possibilities of successful communication which will help kindergarten teachers to resolve problems and achieve their goals in an easier and efficient way. One of the main goals is improving the communication between the kindergarten teacher, children and parents, in order to more easily influence the child's overall development that will significantly contribute to their future life challenges.