The economic integration is an important trend of world economic development from the past to the present. The current economic integration in various regions (Regional Trade Agreements) has continued to grow. Regional trade agreements (RTAs) have spread rapidly throughout the world since the early 1990s. RTAs are defined as reciprocal trade agreements between two or more partners. They include free trade agreements (FTA) and customs unions. The members that are parties to such agreement to allow entry into the market (market) more than and extensive than the terms of the Agreement of the World Trade Organization (WTO), whether those members would be a WTO member or not. RATs and the WTO share the common objective of trade liberalisation and trade discrimination. Trade liberalisation within a trading bloc tends to be beneficial when it promotes a shift of resources from inefficient domestic suppliers to more efficient producers within the region. Economists call this phenomenon trade creation. Conversely, a trading bloc is likely to be harmful if it generates a shift of resources from efficient external producers to inefficient producers within the region. This is a consequence of trade discrimination, which economists call trade diversion. Result of trade creation is free goods can imported from member countries that produce is cheaper. Result of trade diversion is change imports from non-members countries outside the RTAs that have been cheap produced to the members countries in which production is more expensive and add production efficiency from the increased competition. RTAS may be both advantages and disadvantages. The advantages of RTAs are importing goods have been cheaper and increase exporting, Use the benefits from the savings due to the scale of production, Reduce the company's monopoly power in the country and Optimization, Attracting direct investment from foreign, increased bargaining power in the negotiations WTO, be laboratory for full liberalization and prevent a return to use a policy of closing the country's underdeveloped countries. In the part of disadvantages RTAs are loss of tax revenue, trade and investment diversion, the burden on customs system: rules of origin, loss of sovereignty in defining policy, May be an unequal distribution of benefits among members from different bargaining power, effect to excessive dependency on certain markets and trade relations more complex. However, in preparation for RTAs. If carried out according to the rules and etiquette. The real benefit is that consumers will able consume the product and receive a quality service at a lower price than before liberalization and goods, it also offers even more variety. While the manufacturer or trader that is protected from the authorities or had a handicap that is subsidizing, the tariffs on imported goods competing products manufactured in the country. If these operators can not adjust or adapt it must not go out of business eventually. RTAs process is not a bad thing and it must occur according to the current globalization that led to the modification of the domestic economic structure as a whole to strengthen the countries based on potential to use market mechanisms, guidance on economic activity. Eliminate restrictions / impediments to economic activity. And is open to trade and foreign investment.