Abstract: This study touches upon several issues concerning the use of results of operational and search activity in the process of proving for criminal cases on the basis of the analysis of the current Russian laws and judicial and legal acts as well as using scientific and reseachers’ approaches. The researchers point at crime rate in Russia related to detection of terrorism-related crimes, emphasize the importance of operational and search activity in investigation of the specified category of crimes. Attention is drawn to the necessity of improving the criminal and procedural laws concerning the use of results of the operational and search activity in the process of proving and of formalising the list of procedural search activities.