The research aims to design an aquatic rehabilitation program to learn the backstroke and treatment hyperkyphosis for primary stage students. The two researchers used the semi-experimental method by using the pre and post measurement for one experimental group on a sample selected intentionally, it consisted of (20) students. The results of the research have shown that the positive effect of an aquatic rehabilitation program on the students with hyperkyphosis resulted in an improvement in the variables under consideration ( increase in the total length of the body and the length of the spine, improvement in the performance skills of the Backstroke, improvement in the measurements of the angles of the thoracic spine region when performing various movements "upright, taking maximum inspiration, maximum output exhalation", improvement of the physiological measurements such as (inspiratory vital capacity, forced vital capacity, forced expiratory volume in 1 second , peak expiratory flow , blood pressure "systolic, diastolic ", pulse at rest) .