The Internet technology has enabled companies to create a new market space that facilitates electronic interactions among multiple buyers and sellers. It is believed that the perceived benefits of e-commerce have a great impact on e-marketplaces usage. However, research shows that Supply Chain Management (SCM) influenced by ecommerce. This paper is to investigate the relationship between B2B e-commerce benefits, supply chain management and e-marketplace usage. Structural equation modeling technique was employed using AMOS 7.0 to verify the reliability and validity of the multi-item scales and to test the hypothesized relationships.