The aim of the research is to identify the verbal means of constructive speech behaviour of a teacher in the implementation of skills set by the professional standard of a teacher in relation to the participants in a conflict educational environment. The paper substantiates the necessity and expediency of forming constructive speech behaviour in conflict situations as one of the most important components in the system of professional activity of a teacher. The paper is novel in that examining the problem of formation of a teacher’s constructive speech conflict behaviour, it identifies standardised educational and developmental skills, namely, the ability to manage students’ conduct to ensure the safety of the educational environment and the ability to provide pedagogical support to a student in a conflict situation. The developed speech means of implementing professional pedagogical actions in a conflict educational environment, considered as the verbal techniques for revealing the content of educational and professional tasks for educational modules in professional pedagogical education related to conflict resolution, are new as well. As a result, it has been proved that it is possible to ensure the safety of the educational environment and preserve the personal well-being of students in a conflict situation by realising the potential of the persuasion, argumentation, encouragement, empathy, prohibition speech tactics. This demonstrates the extent to which teachers master constructive speech behaviour in a conflict educational environment.