The article analyzes the emergence and development of human rights in ancient Greece as a socio-historical phenomenon. The author finds that the term «human rights» originated relatively recently and finally became established after the adoption of the Universal Declaration of Human Rights by the UN General Assembly on December 10, 1948, but the ideas of equality and justice were traced in such ancient collections as Hammurabi's Laws, Moses' Laws, Old Testament, Laws of Manu, etc. It is established that the protection of individual rights in ancient times became widespread in ancient Greece, where human rights became a natural consequence of the polis form of democracy and were associated mainly with the concept of citizenship, which provided the equality of all members of the policy in the exercise of rights and freedoms, especially political. Consequently, the existence of human rights, recognized by most ancient Greek thinkers, in particular the principles of equality, justice, freedom and protection of individual rights are traced in the works of Homer, Hesiod, Pythagoreans, Democritus, Sophists (especially Protagoras, Antiphon, Lycophron, Alcidamas of Elaea), Socrates, Plato, Aristotle and Epicurus. Certain human rights provisions were included in the Draconian laws, which restricted the over-interpretation of the law by the archons, as well as Solon's reforms, regarding to, inter alia, the cancellation of the debts of the poor and the granting them of certain rights, including political ones. For ancient Greece, the notion of natural law, founded by Hesiod as a law by nature (feses), is fundamental. The Pythagoreans formulated the concepts of «appropriate measure» and «proportionality» as justice in human relations, which played an important role in shaping the ideas of legal equality of people. Democritus first raised the problem of individual human freedom, arguing that wise and good people, because they are able to comprehend the laws of nature and the highest justice, must live freely. The Sophists established the postulate of the fundamentality of natural law, contrasting it with positive law. Protagoras formulated the maxim: «Man is the measure of all things», which is in fact decisive in the modern concept of human rights and freedoms, where man is proclaimed the highest value. Protagoras and Antiphon substantiated the idea of equality of all people by nature. Alcidamas of Elaea, and later the Stoics developed the idea of equality of all people, including slaves. Lycophron declared personal rights an inalienable natural right. Socrates recognized political freedom, in accordance with the requirements of reason and justice, a beautiful and majestic property for both man and the state. Plato, like Socrates, identified legality (law) and justice. He proclaimed the principle of equality of all before the state, regardless of origin and gender. Aristotle distinguished between distributive and equalizing justice, which is the basis of modern legal understanding. He argued that natural law personifies political justice, which is possible only between free and equal people. Epicurus believed that justice, which comes from nature, is also a socially contractual phenomenon. He substantiated the ethical autonomy of man.