This study aims to identify the factors that influence the intention to participate in the Istiqlal energy waqf. This study examines the effect of knowledge, and environmental concern on attitude in Istiqlal energy waqf participation. In addition, it examines the effect of the variables in the Theory Planned Behavior on the intention to participate in the Istiqlal energy waqf. The analytical technique used is the Structural Equation Model (SEM) which is operated with AMOS 23 software. The respondents in this study were 200 people representing gen Y and gen Z Muslims in Indonesia aged 18-40 years. The results showed that environmental concern had an effect on attitude and perceived behavioral control had an effect on the intention to participate in Istiqlal energy waqf. Meanwhile, knowledge has no effect on attitude. Attitude and subjective norms were also found to have no effect on the intention to participate in the Istiqlal energy waqf.