Аннотация:This article considers the problems related to the transformation of the criminal legal norms, which are classified as terrorism-related crimes, in particular, as an act of terrorism. Rapid development of the norms of criminal law requires introduction of these changes into the applicable Criminal Code of the Russian Federation. This article represents an analysis of criminal responsibility for an act of terrorism, an analysis of the legal acts, which, in our opinion, have imperfections and inaccuracies in the formulation the concepts, negative effect of mushrooming norms in the General Part of the Criminal Code of the Russian Federation, which is in contradiction with the basic principles of the criminal law. Existence of a problem of definition of the purposes of establishment of a terrorist group has been identified; confusion in the forms of complicity and types of accomplices has been revealed. A need for harmonization of the terminology in the norms of the Special Part of the Criminal Code of the Russian Federation has been identified and substantiated.