Focusing on two goal orientations (the learning and performance prove-goal orientation), this study proposed a different mechanism for dealing with the knowledge-sharing dilemma. We analyzed data from 257 employee-coworker dyads, finding that the learning goal orientation positively affected knowledge sharing, while the performance prove-goal orientation negatively affected knowledge sharing. In addition, highlighting the importance of coworker influence, our analysis showed that coworker popularity served as social cue to boost the main effects of knowledge sharing. Specifically, the positive relationship between the learning goal orientation and knowledge sharing and the negative relationship between the performance prove-goal orientation and knowledge sharing were stronger when coworker popularity was higher. These findings contribute to articulating theoretical directions at the individual level for addressing the dilemma associated with knowledge sharing. Furthermore, they offer practical implications by emphasizing the ongoing importance of considering the influence of coworkers, who serve as crucial exchange partners during task execution.