In conducting an analysis of the interaction between the prosecutor’s office and constitutional (statutory) councils in the constituent entities of the Russian Federation, the author examines the concept of interaction, forms of interaction, and identifies the relevance of institutional dialogue and the conclusion of cooperation agreements. The purpose of this study is to analyze the content and forms of legal interaction between regional prosecutor’s offices and constitutional (charter) councils of the constituent entities of the Russian Federation, as well as to emphasize the importance of their institutional dialogue in the human rights sphere. To achieve this goal, the following tasks have been set: to reveal the concept of legal interaction between the prosecutor’s office and the constitutional (charter) council; to identify the legal basis, possible forms of their interaction (coordination interaction within the framework of cooperation agreements, subordination interaction in prosecutorial and supervisory relations); to substantiate the relevance of establishing an institutional dialogue between the prosecutor’s office and the constitutional (charter) council in order to increase the effectiveness of their human rights activities in a single system of public authority. The scientific novelty of this work is defined by its focus on the concept of interaction between two state human rights institutions — prosecutorial bodies and constitutional (charter) courts in the constituent entities of the Russian Federation — and the refinement of their potential forms of interaction.