The reform of the Polish Code of Criminal Procedure from September 27, 2013, is one of the most fundamental acts in the history of Polish Criminal Procedure. It is, however, not only a big step forward, but rather a beginning of a new era of the process of adversarial judicial procedure. Thus, it will require some changes in the future and it will be a matter of time before it is clear which direction the changes will take. In this article, the author describes the drafts of the reform and points out the main tendencies that arose during the legislation process. It gives a detailed analysis of upcoming changes in criminal procedure and shares some doubts over certain aspects of the reform.