The author of the article, based on the analysis of scientific sources and the criminal procedure law of Ukraine, studied the issue of the amount of procedural powers of parties in the criminal proceedings of evidence and identified areas of normative regulation. A science-based proposals for their solution. Determined that the subject of proof in criminal proceedings are persons in the manner prescribed by Code of Ukraine, endowed with the responsibility for the implementation of the process of proof in criminal proceedings (taking evidence, checking and otsinyky obtained evidence and use this evidence to justify judicial decisions) or are eligible to participate actively in the process of proof, realizing their procedural interests.

Keywords: party criminal proceedings, proof, prosecutor, defender, investigator.