The paper considers legal media discourse as a discursive format that arose as a result of the interaction of legal discourse and media discourse. The research is aimed at defining the boundaries, structure and categories of legal media discourse. The material of the research are texts of legal media discourse including analytical articles on legal issues, regulatory legal acts, news materials and other genres implemented within the boundaries of the discursive format under study. The research applies methods of scientific description (systematization and interpretation), discursive analysis, as well as the simulation method. The paper provides an overview of research in the field of legal discourse and media discourse, which helps to get closer to defining the boundaries of the format under study, which represents a promising direction for further research. As a result of the systematization of the theoretical and practical material, the boundaries and structure of legal media discourse are determined. It is established that the boundaries of legal media discourse, which is a hybrid discursive formation, lie within the intersection of legal discourse with media discourse. The resulting discursive space has a field structure (core, periphery) and represents a discourse format that concretizes two types of discourse (legal discourse and media discourse) and is represented in turn by different genres. The article gives the description of the categories of legal media discourse, which is based on the model proposed by V. I. Karasik. The paper reveals typical participants of communication, their possible presuppositions, sphere of functioning, chronotope, goals and strategies, genre organization. The author also discusses the issue of implementing the expressive function in legal media discourse through the use of colloquial and obscene lexemes.