Background:Brain Gym is an innovative new approach to learning that was drawn from a comprehensive body of research from developmental specialists focused on the role that physical movements played in improving learning capacities. Aim: the study aimed to evaluate the impact of brain gym training on cognitive performance of undergraduate nursing students'. Hypothesis: Undergraduate nursing students who receive the brain gym training exhibit more improvement of their cognitive performance than those who did not receive it. Design: the study followed a quasi-experimental design. Setting: the study was carried out in El-Hadara Traumatology and Orthopedic University Hospital, Alexandria University/Egypt. Subjects: Convenience sample of sixty undergraduate nursing students who agreed to participate in the study were randomly assigned and divided alternatively into two equal groups 30 patients in each group. Tools: two tools were used to collect the necessary data Tool I: Undergraduate nursing students structured interview schedule Tool II: Undergraduate Nursing Students' Cognitive Performance assessment schedule clinical evaluation tool. Results: After brain gym training for one month the majority of students in study group show significant improvement in all cognitive abilities assessment criteria. Conclusion after brain gym training for one month the majority of students in study groups showed significant improvement in all cognitive abilities assessment criteria. Recommendations of this study included that the brain gym technique should be integrated in nursing theory and clinical training to improve the level of students' knowledge and performance.