This paper was designed to illustrate the advantages of immunohistological methods over those traditionally employed in this country for the study of material evidence. A method for the identification of ABO antigens in cellular elements based on the use of Diagnostic BioSystems-Universal HPP kits is described. The reaction is specific and as sensitive as the immunofluorescent techniques. The stained preparations can be stored during a long period without the loss of their properties. The authors recommend to use the method being considered in forensic medical (specifically, in forensic cytological) practice.