Harmony, as one of the widespread terms of ancient Greek mythology and one of the key notions, as well as the basic methodological principle of ancient Greek Philosophy is analyzed. The mosaicity of philosophical ideas as for the harmony phenomenon was concentrated around two conceptual approaches proposed by Pifagor and Heraclite. Though, these ideas have much in common in methodological sense, Pifagor’s and Heraclite’s conceptions are qualitatively different and even contrary in the explanation of harmony essence and its (...) role and place in the integral world functioning. Pifagor considers harmony as the initial fundamental quality of the world directed on merging, combination, coordination, as well as conciliation of contraries with its different traits. Heraclite considered the origin of the world, as a single phenomenon, not in the harmony but in eternal struggle, hostility of contraries which resulted in harmony. The hypothesis about the importance of mentioned conceptions for the development of Western European model of harmony is proposed. (shrink)