en Nursing Review <strong>Introduction: </strong>Since the identification of priorities in planning can be decisive in reducing moral stress, this study aimed to review the impact of adherence to the principles of professional ethics on nursing performance reported in previous studies.<span dir="RTL"></span><br> <strong>Material and Methods</strong>: The search strategy in the present review was to screen the relevant studies published from the inception until 2020 on databases of PubMed/Med line, Web of science, CINAHL, Google Scholar, Magiran and SID, the results of which led to the extraction of 1785 related articles. After deleting duplicates and reviewing searched articles by researchers based on relevance, 27 articles were included in the study, 16 of which were excluded due to inaccessibility to the original articles and also writing in languages other than English and Persian. Eventually, 11 articles enrolled in the final analysis.<span dir="RTL"></span><br> <strong>Results</strong>: The studies emphasized four basic principles, including &#39;&#39;The effect of training on the development of ethical decision-making&#39;&#39;, &#39;&#39;Understanding personnel and their response to ethical considerations&#39;&#39;, &#39;&#39;Moral reasoning levels of personnel&#39;&#39;, and &#39;&#39;Factors affecting the ethical decision- making of personnel&#39;&#39;. Responsibility, improving the quality of patient care, and respect for the patient were the most important principles of professional ethics in nursing, whose full observance had been resulted in the reporting of favorable outcomes in studies.<span dir="RTL"></span><br> <strong>Conclusion</strong>: It seems that establishing a peaceful work environment can be effective in promoting adherence to professional ethics in various dimensions by nurses and in reporting misconduct in the workplace. Nurses' performance, Nursing, Professional ethics 40 47 http://tbsrj.mazums.ac.ir/browse.php?a_code=A-10-3544-1&slc_lang=en&sid=1 Samira Golchin Mehr samiragolchinmehr@gmail.com 100319475328460030511 100319475328460030511 No Student Research Committee, School of Nursing and Midwifery, Mazandaran University of Medical Sciences, Sari, Iran. Elahe Azami elahe74kind@gmail.com 100319475328460030512 100319475328460030512 No Student Research Committee, School of Nursing and Midwifery, Mazandaran University of Medical Sciences, Sari, Iran. Mahsa Kamali kamali2n@gmail.com 100319475328460030513 100319475328460030513 No Pediatric Infectious Diseases Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran. Hedayat Jafari hedayat2003@yahoo.com 100319475328460030514 100319475328460030514 Yes Department of Medical-Surgical Nursing, Traditional and Complementary Medicine Research Center, Addiction Research Institute, Mazandaran University of Medical Sciences, Sari, Iran.