The purpose of this study is to examine the causal relationships among knowledge management system(KMS) quality, perceived ease of use, perceived usefulness, attitude, and continuance use of KMS. The results of data analysis by structured equation model (SEM) indicate that KMS quality significantly influences individual's perceived ease of use and perceived usefulness. Perceived ease of use affects individual's perceived usefulness on KMS. Individual's perceived ease of use and perceived usefulness affect on the creation of a positive attitude, and attitude affects continuance use of KMS. Based on the results, theoretical and practical implications of this study are discussed.