LIMITS OF COGNITION OF CRIMINAL CASE FACTUAL SITUATION BY THE ATTORNEY-AT-LAW Orlov Aleksandr Aleksandrovich. <...> Email: ao@gradfirm.ru Annotation: One of the main tasks of the defense in a criminal trial is to identify the circumstances justifying the suspect or the accused or mitigate their punishment. <...> For such activities, undoubtedly having cognitive character, Criminal Procedure Act gives the defense a significant number of procedural powers, but some scholars believe these powers inadequate, limited, which, in their opinion, contrary to the principle of adversarial proceedings and equality of arms. <...> Lack of common views on the relation of cognitive powers of prosecution and defense leads to misunderstanding them, in fact, the opposite functions, which negatively affects the law enforcement practice. <...> Disagreeing with the above mentioned approaches and the problem, the author expresses his own attitude to the issue of restrictions on the activities of the lawyer in the knowledge of the actual circumstances of the criminal case, which makes the article very relevant. <...> The author's purpose in this article was to analyze factors influencing the establishment of limits and limitations in cognitive activity of the lawyer. <...> The article describes the various ranges of cognitive activity marker, formed relationships with his client (the principal) and its position in the criminal case, the status of the marker and its role in the process. <...> Apart from the legal and professional ethical factors in relations lawyer and client, studied the psychological factor, which takes place in the relationship lawyer and a representative of the principal influencing the selection and formation of a lawyerrepresentative position on the case. <...> The author makes a noteworthy conclusion that the legal nature of the security features in advocacy different than representational function. <...> Scientific novelty provided by the article is that it is different systematic approach to the study of the problems indicated in the criminal procedure, professional and ethical and psychological aspects. <...> The usefulness of this article seems that the conclusions contained in it can be used for targeted training of young cadres Bar. <...> Analysis conducted by the author, he received the findings are noteworthy leading researchers of the Russian legal, are a major cause for enhancing the scientific debate on the issues marked. <...> Brester A.A. Panchenko V.Y. Public beginning of the modern Russian criminal trial and legal assistance / / LawвОr. 2012. № 12. 3. <...> Galoganov E.A. Participation of defense counsel in ЭСО ЭrТКХ МoЮrЭ // LКа prКМЭТМО. 2005 <...>