The trade liberalization and globalization, supported by the advanced technology of information and communication, has changed the global economy into more open and outward. In this context, the increasing power of Multinational Corporations (MNCs) has shifted the pattern of the global economy, thus making the competition livelier than ever. However, the growing market power of MNC makes them tend to dominance. The absence of international investment regime to control the behavior of MNC become one of the primary concerns. It depends on the competition regime of each country to suppress the dominant tendency of MNC. Google Antitrust Search case is one of the cases in which the business conduct of MNC has infringed the antitrust regulation in which promoting the consumer welfare and strive to protect competition. This thesis will try to analyze on how Google, Inc., has breached the antitrust regulation -which is a part of competition regime- of European Union, and explain on why E.U. decide to enforce antitrust regulation on Google, Inc.