Assessment of student nurse's clinical skills is an important issue in nurse education. However, suitable instruments are difficult to design. The development of reliable measurements of student performance with predictive validity of role is a gold standard yet to be achieved. Two aspects of reliability have been well researched inter-rater and inter-case [candidate]. Inter-rater measures the consistency of rating of performance by different evaluators. The use of multiple evaluators across cases improves reliability. So the aim of this study is to test content validity and inter-rater reliability of the evaluation tool for medical surgical nursing students at Banha University. The study was carried out in the Faculty of Nursing at Banha University. The inter-rater reliability was established by having the investigators and another qualified clinical instructors [who had more than three years experience as an instructor in the Medical-Surgical Nursing Department] evaluating the students during their practice in the four clinical areas: CCU, Orthopedics, Urology, and Neurosurgery simultaneously and independently, rating the same student. Both raters were not aware of each other scores to the entire students. It can be conclude that this tool after testing the content validity was highly reliable between faculty members. It is recommended that Faculty of Nursing needs to establish clinical evaluation standards for all selected variables within its clinical area. These standards should include what to be observations should be documented.