ObjectiveTo evaluate perceptions of being mistreated during internship among first year Oman Medical Specialty Board residents.DesignA cross-sectional study.SettingTraining centres for Oman Medical Specialty Board.ParticipantsFirst year medical residents following completion of internship during the study period 2009–2010.MethodA cross-sectional survey of first year medical residents.ResultsOf 58 residents (response rate 84%), 96.6% perceived that mistreatment exists. Among different types of mistreatment reported, verbal and academic abuses were the most common (87.9%), followed by sexual harassment (24.1%), then physical abuse (22.4%). Forty-four (75.9%) residents had advised at least one of their relatives not to join medical school.ConclusionsMistreatment of medical interns is an ethical issue challenging the quality of clinical training. Further research is needed to understand factors influencing mistreatment and to draw guidelines to limit such problems.