Objective To describe the level of deviant workplace behaviors of junior nurses and to explore its influencing factors. Methods A total of 368 junior nurses were invited to fill out the Workplace Deviance Scale, Barriers to Medication Administration Error Reporting Questionnaire and Nurses′ Moral Courage Scale. Results The score of deviant workplace behavior was (27.19±7.14). Multiple linear regression analysis showed that medication administration error reporting barriers, moral courage and work length were factors influencing deviant behaviors of junior nurses (P<0.05, P<0.01). Conclusion The workplace deviance behaviors of junior nurses was at low level. Nursing managers should take target interventions to ameliorate deviant behaviors of junior nurses.