A focal irm is dependent on the suppliers and sometimes needs to develop the suppliers to improve their capabilities. Several development programs are available. Knowledge sharing in the supply chain is one of the supplier development programs. In the literature, it has shown that there is a relationship between knowledge sharing and leadership, organizational culture, and trust. However, the mechanism of knowledge sharing is scarcely studied. With this study, we aim to ill the knowledge gap by exploring the relationship between knowledge sharing by forced learning and leadership, collaborative culture, and trust. Analysis of empirical data by partial least square structural equation modeling (PLS-SEM) suggests that knowledge sharing by forced learning is justi ied if the supplier irm has appropriate leadership and collaborative culture, and trust exists between the business partners.