Knowledge sharing behavior has received increased attention in the context of business due to its important role in enhancing organizational competitive advantage. This study aimed to identify possible predictors of knowledge sharing behavior and its underlying mechanisms from a multilevel perspective. The results showed that interactional justice positively related to knowledge sharing behavior both at the individual and the team levels. And organizational commitment took a mediated role between them. This study is the first to highlight the role of organizational commitment and interactional justice in knowledge sharing behavior, enriching current understanding of organizational knowledge management and providing further suggestions as how managers can improve knowledge sharing behavior in their organizations. (C) 2016 Elsevier Inc. All rights reserved.