The article discusses the concept of the investigator’s communicative competence, its professional significance, and the necessity of developing it among future prosecution investigators. The investigator’s communicative skills are manifested in the ability to identify communication goals, assess the state of professional interaction, establish and maintain psychological contact with participants in communication, choose appropriate strategies for conversation, and be prepared to make meaningful changes in their own behavior. The investigator’s interaction with participants in a criminal case—suspects, defendants, witnesses, victims, lawyers, prosecutors, experts, and interpreters—is a complex and multifaceted process of establishing and developing relationships in joint human activity. This process follows the general laws of communication, including the exchange of information (the communicative aspect) and the regulation of partners’ behavior in relation to the communication situation (the interactive aspect). The investigator’s communicative competence is related to the psychological phenomena of interpersonal perception and emotional states that arise during communicative activity, as well as to establishing effective communication with individuals under investigation and other participants in the criminal process.