This study investigates the role of entrepreneurship social competence to build a business network and to improve the competitive advantage and business performance of Small Medium Sized Enterprises (SME). This study collaborates entrepreneurship competence and social competence, so as it creates a new concept that is of entrepreneurship social competence. Samples in this study are the owner and the entrepreneurs of batik industry in Indonesia. There are 197 respondents and Structural Equation Modeling (SME) is used as a tool to analyze the data with AMOS 16.0 as the aid tool. The results from this study show that entrepreneurship social competence deeply influence the business network, competitive advantage and business performance of Small Medium Sized Enterprises (SME).