This study utilizes structural equation modeling (SEM) to explore the positive effect of corporate environmental ethics on competitive advantage in the Taiwanese manufacturing industry via the mediator: green innovation performance. This study divides green innovation into green product innovation and green process innovation. The empirical results show that corporate environmental ethics positively affects green product innovation and green process innovation. In addition, this study verifies that green product innovation performance mediates the positive relationship between corporate environmental ethics and competitive advantage, but green process innovation performance does not. The research results are beneficial to the manufacturing industry of Taiwan.