It is important to understand consumer attitudes associated with their eco-friendly behavior on account of not only environmental reasons, but also corporate aspects. In this study, we examine the relations between variables influencing eco-friendly attitudes and eco-friendly behavioral intentions, namely, recycling, reusing, and reducing (3R). We first, performed a theoretical consideration through reviews of literature on ethical identity, ethical obligation, altruism, and eco-friendly attitudes, and behavioral intentions. Based on the literature review, we designed a study model and drew hypotheses. Further, we collected data using a survey and processed them statistically in order to verify the hypotheses. A total of 265 samples were collected and the data were analyzed using a structural equation model (-LISREL 8.70). The results suggest that ethical identity and altruism significantly influence environmental attitudes. However, the effects of ethical obligations on eco-friendly attitudes are insignificant. The environmental attitudes have a significant effects on the consumer behavioral intention for recycling, reusing, and reducing. Although this study has some limitations, it is expected that it will positively trigger follow-up research.