This work is talking about the problem of silence in communication, actually about the problems of silence at school. As a matter of fact, silence is communication, because it belongs to nonverbal segment of communication. It appears in different forms and it has different meanings. The forms of silence and its appearance depend on different life situations of each person and on the person’s character, as well. The silence at school has a powerful dimension and it is just like that because it is very difficult to realize the causes of silence, and just these reasons are the key to an effective teaching process. The interaction between a teacher and a student is the most difficult, the most responsible, the most complex and the most demanding experience because a teacher has to watch, to listen, to notice, to observe all the time and to seek for the signs of verbal and nonverbal communication, among which is the silence, too. The research part of this work is related to silence in interaction of a teacher and a student, then to the silence between a student and his/her peers, furthermore to silence in interaction between a teacher and his/her working colleagues and in the end between a teacher and students’ parents. This research work brings the results for the reasons of silence between a teacher and a student, the results of recognition of silence with the students, working colleagues and students’ parents by their teachers, and the reactions of teachers to their interlocutor’s silence.