The European Union is currently an economic union, which means that it has almost removed every internal barrier to trade, therefore achieving the free circulation of all factors of production (goods, services, capital, and persons) across the union. The North America Free Trade Agreement (NAFTA) establishes a free trade area, with the main purpose of eliminating tariffs among its members, and to some extent, reducing other non-tariff barriers to facilitate the cross-border movement of goods. Despite their difference, both regions seek to achieve a certain degree of free movement when trading goods within their respective e internal markets. This study will analyze the role of the free movement of goods in the European Union and in the NAFTA, pointing out as main problem the proliferation of non-tariff barriers and as the main solution the harmonization of national laws and regulations, and the promotion of regional institutions