<![CDATA[The gap between students’ environmental knowledge and actual sustainable consumption behavior remains a key challenge in environmental education. This study aims to analyze the effect of ecological literacy on sustainable consumption behavior with peer influence as a moderating variable among tenth-grade students at SMAN 1 Kadugede, Academic Year 2025/2026. A quantitative survey approach was employed, with data collected via Likert-scale questionnaires distributed to 156 respondents using proportional random sampling. Data analysis employed multiple linear regression and moderated regression analysis (MRA). Results show that ecological literacy has a significant positive effect on sustainable consumption behavior (β = 0.343, t = 5.157, p < 0.01). Furthermore, peer influence significantly moderates the relationship between ecological literacy and sustainable consumption behavior, strengthening the positive effect when students are surrounded by a pro-environmental peer group. Simultaneously, ecological literacy and peer influence explain 51.1% of the variance in sustainable consumption behavior (F = 80.040, p < 0.001). These findings imply that improving sustainable consumption behavior among adolescents requires not only enhancing environmental literacy but also cultivating a supportive social culture within schools through group-based environmental programs. Keywords: Ecological Literacy, Peer Influence, Sustainable Consumption Behavior.]]>
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