The monograph examines the problems of theory and practice of proving the prosecution in the pre-trial investigation of corruption crimes in the field of official activities and professional activities related to the provision of public services, in particular: the state of research, their nature and methodology. The content of the author's system of circumstances to be proved in criminal proceedings of this category, the evidentiary activity of the prosecution at the initial stage of the pre-trial investigation, the peculiarities of proving in the pre-trial investigation of corruption crimes committed by a certain category of persons. The work can be useful for researchers, teachers, university students, law enforcement practitioners, judges, lawyers and anyone interested in criminal proceedings.