Background: Nurses are committed with maintaining standards of advocacy at acceptable professional level, accountability relating to actions, guarding against stepping beyond the boundaries of their professional practice of advocacy, and acquiring adequate knowledge about the law and regulations concerning psychiatric patients. Aim: To reflect hospitalized psychiatric patients' awareness about their rights and nurses' obligation with these rights as perceived by patients. Subjects and method: Design: A descriptive design was used. Setting: Alhasa for mental health hospital, Saudi Arabia. Subjects: A total number of 237 inpatients and outpatient participants as well as 136 nurses included in the study. Tools of data collection: Attitudes towards patients' rights scale as well as two structured modified questionnaires were adopted to collect data. Results: Rights encompass no forced treatment, no forced hospitalization and no physical restrictions viewed by nurses as inconsequential requirements for psychiatric patients. Conclusion: Participated patients grumbled of nurses' incompliance with preservation and protection their rights; they also declared that they had not been informed about most of their rights. Recommendations: Conducting workshops simultaneously with discussion sessions for nurses in order to announce for all psychiatric patients' bill of rights and affirm the role of nurse as a patient's advocator.