Information sharing practices among the supply chain partners enhance supply chain flexibility. The exchange of information sharing, however, may not ensure the expected quality outcomes of information. To test the mediating role of mutual trust between information sharing and information quality, this study uniquely examines four contexts of information sharing (receiving information from customers; receiving information from suppliers; providing information to customers; and providing information to suppliers). With two theoretical lenses, attribution theory and transaction cost theory, this study empirically investigates the interrelationships among information sharing, information quality, mutual trust, and supply chain flexibility with data from 74 Korean steel firms. The results suggest that (1) attribution error (i.e., self-service bias) is likely to happen when it comes to providing information context and (2) mutual trust plays a crucial role in transferring information sharing into information quality. Implications as well as future research opportunities are provided.