Background: Ethical Climate significantly influences nurses' attitudes and ethical conduct. It increases the perceived organizational support from hospitals and decreases engagement in deviant workplace behaviors. The study aimed to assess nurses' perception of ethical climate and its relation to workplace deviance behavior. Research design: A descriptive correlation research design. Setting: All staff nurses available during data collection, totaling 389 participants. Tools of data collection: Two tools were used, 1^st tool was self-administer questionnaire consisted of two parts as socio demographic part and ethical work climate part, 2^nd  tool was workplace deviance. Results: reveals that (68.1%) of nurses perceived a high level of total ethical work climate and (31.9%) of them had a moderate level of perception about total ethical work climate. Moreover (100%) of nurses have low level of perception about behavior of work deviance. Conclusion: there was a negative statistically significant correlation between ethical work climate and workplace deviance  with highly statistical significant (P <= .000**). Recommendations:  Create strategies by the hospital management to promote supportive work environment and reduce workplace deviance behaviors including providing rewards, including providing