The purpose of the article is to comprehensively describe the institution of reporter’s privilege under Polish law and the mechanisms of its protection. The article discusses the concept of reporter’s privilege regulated in the Press Law, as well as the proceedings to release a journalist from the obligation of confidentiality in a criminal trial. Procedural considerations are preceded by a discussion of the scope of reporter’s privilege and the persons to whom it applies. As a rule, the informant is the holder of the information provided to the press. Nevertheless, the legislator also provides for such situations where the proper functioning of the justice system releases a journalist from the obligation to keep the obtained information confidential. This is reflected in the grounds for releasing a journalist from obligation of confidentiality under the Code of Criminal Procedure. The question arises about the conflict of principles: freedom of the press and the proper functioning of the justice system. The aim of this publication is to present the essence and assumptions of reporter’s privilege and the construction of Art. 180 § 2 to 5 of the Code of Criminal Procedure, to signal the most common problems that arise when applying the institution of exempting a journalist from the obligation of confidentiality, and to attempt to indicate possible solutions in this regard, contributing to the shaping of the proper practice of investigative bodies.