This study employs the Stimulus-Response theory to predict consumer behavior in Bangladeshi supermarkets, focusing on retail shopping intentions, spending patterns, and environmental responsibility. Data from various superstores, including Shwapno, Agora, Meena Bazar, Prince Bazar Ltd. (Mirpur), and AMA Fresh Food, was collected through online and offline surveys with 196 respondents and analyzed using IBM SPSS 25.0. Results indicate a robust correlation between environmental responsibility and eco-friendly purchasing behavior and a positive link between environment-friendly purchase intention and actual eco-friendly purchase behavior. While responsible buying aligns with heightened intention, some respondents exhibit lower concern for environmental well-being. Limitations include reliance on cross-sectional data for a specific period and potential cultural constraints. Nevertheless, supporting the S-R theory, these findings offer valuable insights for marketers planning to promote eco-friendly packaging products in Bangladesh's superstore retail sector. The study highlights the S-R theory's relevance in predicting eco-friendly purchasing behavior, emphasizing the importance of environmental purchase intention and behavior in this context.