This article describes the current state of knowledge on pro‐environmental behavior in the workplace by analyzing 17 empirical studies that (1) examined individuals' pro‐environmental behavior at work and (2) performed some type of quantitative analysis to explore antecedents of this behavior. Detailed descriptions of these studies are provided in terms of (1) types of pro‐environmental behavior examined, (2) measures of pro‐environmental behavior, (3) internal factors investigated, (4) external factors investigated, (5) samples examined, and (6) theoretical frameworks used. This article further (...) provides researchers interested in this research topic with directions for future research. Using the information presented in this article, future business ethics studies can offer more comprehensive insight into one's decision to engage in various types of pro‐environmental behavior in the workplace and provide important implications for environmental protection. (shrink)