Purchasing and Logistics are considered by all level of management in the company as two of the most important internal functions within an organization. Both activities are the key factors which contribute towards the company‟s competitive-edge and efficiency through value adding activities. There are significant benefits for a company from a high level of integration exists between Logistics and Purchasing in order to become a dominant market player. Previous studies have shown that the relationship between Purchasing and Logistics have been working diligently together. Logistics can be carried out by operational or manufacturing functions within the company whereas Purchasing is often seen as a „supporting‟ activity. The integration of both activities will lead to a strategic Supply Chain Management process which maximizes the company‟s value and can effectively respond to the company‟s strategic decision. In order to put the integration to practice, a user friendly interface will be needed as well as educating staff to have a clear understanding of both activities.This study has been conducted through case studies of Toyota Motor Asia Pacific - Engineer &Manufacturing Co., Ltd, Toyota Tsusho (Thailand) Co., Ltd, Salee Industry PLC, Kawamura Electric Sale (Thailand) Co., Ltd, Mahakit Rubber Co., Ltd, and Win Win Plus Business Co., Ltd.