Green Religiosity has been increasingly recognized as a key driver of pro-environmental behavior, particularly within faith-based communities. This study aims to empirically examine the influence of Green Religiosity on Green Behavior within Nahdlatul Ulama (NU). It further investigates the mediating role of Green Psychological Climate and the moderating role of Individual Green Values. Data were collected using a quantitative approach from 80 respondents affiliated with 20 institutions under the East Java Regional Board of Nahdlatul Ulama (PWNU Jawa Timur). The data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The findings reveal that Green Religiosity significantly influences Green Behavior and plays a crucial role in shaping Green Psychological Climate. However, Green Psychological Climate does not significantly enhance Green Behavior nor mediate the relationship between Green Religiosity and Green Behavior. Additionally, Individual Green Values do not moderate the effects of Green Religiosity or Green Psychological Climate on Green Behavior.