Nowadays, scholars in management have focused on human capital in organizations and knowledge as the most valuable resource. As the modern management gurus Peter F. Drucker said that the economic knowledge is an important influence and become the decisive advantage factor of competition. The researcher has interests in studying The Knowledge Management: Knowledge Identification of National Sports Associations in Thailand for the purpose of determining the appropriate knowledge to the knowledge management of the Sport Association of Thailand. This research approach is a qualitative research. The data were collected from the literature review and by interview using in-depth interview with key informant from a total of 21 sports association administrators and relevant agencies of the 2 major contributors to the sport authority of Thailand and the contributors from the Department of Education, Ministry of Tourism and Sports total of 23 persons. Information from the interviews showed that the knowledge of the field was divided into two parts: the knowledge of administration development of the sport association and the knowledge of the development of the sport. In the next study, there should be a gap assessment of knowledge in the sport associations. To determine whether the lack of knowledge about the sport and should be studied to determine their knowledge of the sport in terms of technique operators such as sport techniques, coaches or referees, etc., the study should determine the knowledge of sport organization of foreign countries in order to compare and improve our knowledge continuously.