The main objective of the study is to investigate the moderating effect of green Supply Chain Management Practices (GSC-MP), Internail Environment Management (IEM), Internal Supply Chain Process (ISCP), Quality Information System (QIS), Green Knowledge Management Capability (GKMC), and Environment Performance (EP) of pharmaceutical industry of Thailand. For this purpose, data has been collected from the 500-supply chain and procurement managers which yield a 68% response rate. The SEM analysis

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... as shown that ISCM has a positive and significant association with the EP, GKMC also has positive and significant association with the EP. In the same vein, it is also found that IEM and QIS have a positive and significant association with the EM of pharmaceutical industry of Thailand. On the other hand, indirect moderating also shows GSCMP has a significant moderation on the relation of ISCP, IEM, QIS and EP of pharmaceutical industry of Thailand. Whereas, GSCM did not significantly moderates on the relationship of GKMC and EP. These findings show that GSCMP is considered to be a significant moderator because it has moderating effect in most of exogenous and endogenous variable. Thus, based on this study contributed a body of knowledge in the form of empirical findings which could become a new area of research in future. The current study could provide some guidelines to supply chain and procurement department to know about the importance GSCMP to increase the EM. The research limitations and future directions are also discussed at the end of the study.