The study is dealing with one of the most problematic fields of the modern discipline of criminal law - an aspect of the theory of complicity, the general definition of criminal actorship and the future perspectives of these concepts. In its first part, the study gives an overview of the existing positions concerning the notion of criminal actorship, in view of the theories of the most important personalities of the study of Hungarian criminal law. The author examines the concept of perpetration also from a historical point of view, giving a comparative analysis of the problems revealed. Finally, as a conclusion of this part of the study, the author creates a new concept of criminal actorship in line with the actual legal dispositions that minimizes the occurrence of the dogmatic problems revealed above. The second part of the study deals with the problems of legally regulating a special aspect of perpetration: the indirect involvement in a crime, examining the two theories existing in the study of Hungarian criminal law. It aims to reveal the upcoming problems concerning legal regulation - namely whether to situate this notion within the concept of actorship or rather within that of complicity. The ideas drawn up by this part of the study may help create a proper legal regulation of the concept of indirect involvement in a crime.