Jeffcoate et a l. [27] describe e -Business involves internal and external process that involves operational, managerial and strategic advantages, which enable firms to have closer relationship with its customers and suppliers. Therefore, the success of e-Business adoption is represented by the ability to integrate the internal elements and external diffusion (Lin, [7]). In the context of SM Es, the internal integration is associated with t he main internal part such as: the owner-manager and the organizational, whereas the external diffusion influenced by the external influencer such as: trading partner and government. However, the following section of this paper will exp lore the both internal and external factors that impinge the adoption of e-Business for Indonesia SMEs, particularly in B2B sector.