Background: In psychiatric hospitals, aggressive and threats of aggressive constitute serious emergencies that may be difficult to control by nursing staff, the physical restraints are the best solution to protect patient and other. Study design: The one-group pretest-posttest pre-experimental design was practiced. Aim: This study aimed to evaluate the effectiveness of the educational guidelines about physical restrain on nurses? practices at psychiatric hospital.. Setting: This study was conducted at the two settings: Psychiatric department in the ZagazigUniversity Hospital and Al-Dar Hospital of Psychiatry and Addiction at Zagazig city- at El Sharkia- Egypt. Subjects: A convenience sample of 50 psychiatric nurses involved. Tools of the study:Physical restraint questionnaire was used which contains two parts; Part one: The Nurses\' Practices Regarding the Use of Physical Restraint and part two: Socio-demographic and clinical characteristics. The results: The results demonstrates that about two third of studied nurses have an inadequate practice in applying physical restraints before the educational sessions, while, most of the nurses have an adequate practice in applying physical restrain after implementation of educational sessions and there is a positive significant difference in nursing performance of physical restraint before and after educational sessions Conclusions:It can be concluded that the majority of the studied nurses\' level of practices improved after implementation of educational sessions about guidelines to applying physical restraint, with a highly positive significant statistical differencebetween nurses\' level of practices in performing and applying physical restraint before and after educational sessions. Recommendations: Apply the educational sessions about guidelines of applying physical restraint to improve nursing performance in all psychiatric settings and increase awareness of the mental health team about the importance of the policy of applying physical restraint