The author has made in this article aimed to study the contribution of N. Machiavelli, T. Hobbes, J. Locke in developing theory on political power. By analyzing the work of Il Principe, the Discorsi sopra deca di Tito Livio first, Leviathan or The Matter, Form and Power of the Common Wealth Ecclesiasticall and civil, De Cive, Two Treatises of Government is shown the theoretical - methodological these authors in the study issues of power, state power, political power. The study of these problems is of great significance for the Republic of Moldova passed to the democratization of society, building the rule of law. It is necessary to further develop knowledge on power, finding the most effective ways for harmonizing powers.