Background: Proximal humeral fractures are among the most common fractures. Functional recovery of shoulder is often slow and many people have ongoing disability during activities of daily life. Aim: To evaluate effect of rehabilitation exercises on shoulder function after proximal humeral fracture Surgery. Research design: Quasi-experimental research design. Setting: Trauma unit and orthopedic outpatient clinic at Assiut University Hospital. Sample: A convenient sample of one hundred patients with aged from (18-75) years old and from both sexes with proximal humeral fracture, divided into two equal groups (50 patients for each). Tools: I " Patient's health needs assessment sheet ", II " Shoulder function index ", Tool III " Numerical Rating Pain Scale" Results: There was a statistically significant difference between the study and the control group regarding total mean score of the shoulder function index & pain level during follow up periods after application of rehabilitation exercises post proximal humeral fracture Surgery (p-value 0.0179* &0.003 respectively). Conclusion: Application of exercises has positive effect on improving shoulder function and reducing pain after proximal humeral fracture surgery. Recommendations: rehabilitation exercises are recommended to be an integral part of the pre-operative nursing teaching for patients undergoing proximal humeral fracture surgery and a booklet should be available at Trauma Unit and Orthopedic outpatient clinic as a reference.