In this study, the effect of environmental orientation on green supply chain management practices and the regulatory role of external pressure elements in this interaction were examined. In this context, firstly the conceptual framework of the study was explained. Then, the data obtained from 159 companies operating in Turkey and holding ISO 14001 Environmental Management System Certificate using the survey technique were analyzed with structural equation modeling. As a result of the analyzes; it has been determined that the environmental orientation, which consists of internal and external environmental orientation, has a positive effect on green purchasing, green production, green distribution, green packaging and reverse logistics applications, which are among the green supply chain management applications. In addition, it has been found that external pressure factors such as customer pressure, NGO pressure, social media pressure, legislation and law pressure and counterfeit pressure have a regulatory role in the effect of environmental orientation on green supply chain management practices.