The article addresses the issue of the right to information from the point of view of the participants of criminal proceedings. The execution of the right contributes to the principle of equality between the parties, secure execution of the adversarial principle, transparency and to creating the image of law-abidingness and transparent jurisdiction in the mindset of society. Particular attention has been paid to the draft amendment to the Criminal Procedure Code, prepared by the Criminal Law Codification Commission, which ensures the implementation of the right to information more broadly than before, especially in the view of the aggrieved party. The author aims to prove that the effort to increase the adversarial criminal trial cannot be taken into account without reliable process information.