This study aimed to reveal the role of strategic planning practices in enhancing institutional excellence within charitable societies operating in the Gaza Strip, through five main axes of strategic planning (vision, mission, objectives, analysis, strategic choice) and measuring their reflection on the dimensions of institutional excellence (efficiency, effectiveness, quality, innovation, governance). The study adopted the descriptive analytical approach, using a questionnaire distributed to (232) male and female employees who were selected using a simple random sample method. The results showed that the level of strategic planning practice in charitable societies was high, as was institutional excellence, with a strong correlation and influence between them, as strategic planning explains (76.1%) of the changes in the level of institutional excellence. Keywords: human resource management, sustainable development, charitable organizations, Gaza Strip