Abstract: The article is devoted to certain issues related to imperfect legal regulation of using information electronic media as proof in criminal investigation. The object of the research is the law enforcement activity undertaken by preliminary investigation bodies and court to use electronic information and electronic information media as proof. Whereby, the authors pay attention to investigative proceedings that result in seizure and analysis of aforesaid evidence. The subject of the research is a combination of criminally-remedial norms that regulate the procedure of seizure and analysis of electronic media of information, practical implementation thereof, and scientifically grounded positions of criminal procedure researchers on aforesaid matters. In the course of their research the authors have used general and special research methods, in particular, structured system analysis, comparison, generalisation and logical legal analysis. As a result of the research, the authors define a number of areas of concern associated with applying laws that regulate the place and role of electronic media of information in criminal law proof. The authors also make a conclusion about the need in a legal definition of electronic media of information, and legality rules applicable to aforesaid evidence. The authors also recommend measures to improve the criminal law and law enforcement practice in this sphere.