Communication is one of the important areas of professional functions realization by police officers. The formed communicative competence provides the establishment of horizontal and vertical relationships with other people within the professional environment, which is one of the components of the effectiveness of the professional activities of the police in general and the investigator in particular. The communicative element is the leading and dominant component of the activity within the structure of the investigatorís professional activity. Understanding the peculiarities of communicative competence, determining the ways of its formation and development requires careful study of its components namely in future investigators. Therefore, the purpose of the research is to examine the components of communicative competence of prejudicial inquiry bodiesí investigators. Psychodiagnostic tools were used to achieve this purpose, which were tested during the specialistsí training for the prejudicial inquiry units of the Kharkiv National University of Internal Affairs. The obtained results were processed using the methods of mathematical statistics. Most of the participants of interest revealed the existence of a stable process of formation and development of the ability to apply different models and styles of behaviour during communication; gradual development of the ability to feel themselves confident in the situation, adapt to new conditions of the professional and educational environment, etc. The existence of two main variants of behaviour in interpersonal interaction was acknowledged, namely: with predominance of independence, leadership and dominance; with responsibility, focus on cooperation and coherence with others. The research will help to understand the peculiarities of the components of communicative competence of investigators and find effective ways to develop and improve it.Keywords: Communicative Competence, Components, Investigators, Prejudicial Inquiry Bodies, Communicative Abilities, Adaptive Abilities, Types of Interpersonal Interaction.