Abstract
This study aimed to analyze an impact of self-esteem on knowledge sharing motivation and behavior in business organizations. The self esteem was measured by the competence dimension and the social maladjustment dimension. Data were gathered by using questionnaires from 2,000 employees working in various business organizations. The analysis of the data revealed that; 1) not only the competence but also the social maladjustment had positive effects on extrinsic knowledge sharing motivation, 2) only the competence had positive effects on intrinsic motivation.