Background: Organizational life is an essential aspect of the ethical climate that directly affects individual and organizational identification results and green behaviors. An ethical climate is the factor which modifying intraorganizational relationships and affecting employees' attitudes, consequently it has a great impact on organizational outcomes. Aim: This study aims to assess the effect of ethical work climate training program on nurse's perception of green behaviour and organizational identification. Subjects and methods: The study followed a quasiexperimental research design. It included all available nurses' working at medical and surgical departments. Three tools were used to collect the data. The 1st tool is hospital ethical climate scale; the 2nd is employee green behavior scale; and the 3rd is organizational identification scale. Results: There is marked increases in the means of ethical work climate, green behavior, and organizational identification from average too high for pre, post and follow up results respectively. Conclusion: There is high statistically significant positive coefficient relationship of ethical work climate in relation to green behavior and organizational identification weighed by pre, post and follow up results. There is no significance between ethical work climate and background characteristics. Recommendations It is recommended that, health care organizations to develop ethical principles for nursing department, providing it in training program and conducting periodic assessment of knowledge and practices of ethical work climate, green behavior, and organizational identification.