The article examines whether the responsibility of undertakings in Polish antitrust proceedings constitutes a 'criminal charge' under the European Court of Human Rights' criteria. It evaluates the nature of this responsibility against three main criteria: the statutory classification of the offence, the nature of the offence, and the type and severity of the penalties. The author argues that the significant financial sanctions associated with antitrust violations suggest a criminal character, thus necessitating adherence to the safeguards provided by Article 6 of the European Convention on Human Rights.