Abstract The rising interest in environmental protection and sustainability has led to the emergence of a new research focus in human resource management (HRM) field. Scholars in this field have started to investigate how HRM can significantly contribute to achieving sustainable environmental goals and coined the term “green human resource management” (GHRM). Despite the growing interest in studying GHRM, few studies have examined its impact on positive employees' attitudes and behaviour in reducing firms' environmental footprint and enhancing business sustainability. Hence, to bridge this research gap, the present study expanded green research streams by investigating GHRM influence on pro‐environmental behaviours (PEBs) through the mediating effect of green commitment. SmartPLS was employed to test the theoretical framework from 342 valid responses. Present research findings reveal that GHRM practices influence employees' green commitment and PEBs. Moreover, the results also suggest that green commitment mediates the relationship between GHRM and PEBs. In the end, theoretical contributions and implications were discussed.