Perceived organizational support (POS) achieves several positive organizational consequences as well as positive employee behaviors that help hotels to succeed, so the aim of this study is to explore the impact of perceived organizational support on green hotel performance (GHP): a mediating role of green environment practices (GEP) in Egyptian green hotels. A quantitative approach was applied. The targeted population was the employees and their supervisors in Egyptian green star hotels. A questionnaire was used to collect data, which was distributed in South Sinai and Red Sea Governorate from September to November 2023. The research utilized four measurement instruments to measure perceived organizational support, sustainability performance and green environmental practices.382 forms valid replies were collected and examined. This study uses smart PLS-SEM to test the model. The results showed that POS has significant impact on GEP and GHP. Furthermore, green environmental practice improves green hotel performance, and GEP mediates the relationship between POS and GHP. In general, this study gives essential insight into the hospitality industry as it proposes important tactics for hotel managers to enhance their employees' green performance by supporting sustainable practices in hotels. Lastly, this study will help managers who are interested in gaining competitive advantage, applying green practices and increasing sustainability performance by enhancing perceived organizational support for their employees.