Stolper-Samuelson Theorem depends on the International Factor Price Equalization Theorem. In spite of the similarities between them, Stolper Samuelson Theorem explains the distribution of income effects of international trade within a trading country while International Factor Price Equalization Theorem deals with the international distribution of income effects of international trade. According to the Stolper-Samuelson Theorem, international trade does not increase the income of all the factors of production but only the income of the factor that is intensively used in the production of the exported commodity. At the general equilibrium point of the International Factor Price Equalization Theorem, both the relative factor prices and relative commodity prices are equalized.