In conclusion, it can be said that all across Europe the PPS's role in the investigatory stage is extensive only in serious cases. There is also certain participation in less serious cases, although here it might be spoken of a more general guidance being given by the PPS. In minor cases, it can be spoken of only a general guidance given beforehand, leaving the conduction of investigation to police. Even if this practice is guided by enhanced PPS instructions and investigative actions theoretically controlled by PPS afterwards, the study already indicates the increasing power and independence police have already gained within the continental systems in Europe in relation to minor and less serious crime. The further growing of European countries in that part of the criminal justice system can be noticed. The investigative stage is a decisive part of the criminal procedure which lays the foundations for further prosecution. Thus, it is important to look more closely at this part of criminal procedure and the PPS’s role in it. This article concentrates on the police role in the investigative stage in various criminal justice systems and the relationship with each national prosecution service. The article also gives a short overview of the national differences and the similar mechanisms developed. Tables and references