The article examines the historical development and current state of the institution of private prosecution in Swedish legislation. It analyzes the legal foundations, practical application, and the role of private prosecution in safeguarding the interests of victims. Particular attention is paid to the evolution of this institution from the Middle Ages to the modern system, where private prosecution, while subsidiary in nature, fulfills a highly significant function. Based on normative legal acts, doctrinal sources, and the practice of the Swedish National Council for Crime Prevention (Brå), the article demonstrates that private prosecution remains relevant in Sweden as a means of legal protection for vulnerable population groups and as an instrument of democratic oversight over prosecutorial activities.