The purpose of this study is to identify the effect of proposed training program using trampoline for development of functional efficiency of the vestibular apparatus system on the composite balance and improvement of skill performance. There are statistically significant differences between the pre and post measurements in the sample of the research in all physical and physiological variables of the composite balance for the favor of post measurement due to the composite balance exercises set by the training program. The skill performance of front one and half pike improved and the functional efficiency and its impacts on the element of composite balance improved. There is exponent relation between the element of composite balance and development of functional efficiency of the vestibular apparatus. In accordance with the conclusions and results of this study, the researchers recommend as follows: Attention to development of the vestibular apparatus through the training programs applied to the male and female players in the different age groups. Attention shall be paid to introduction of exercises of vestibular system within the program of preparation of diving players in the different sports entities. Conducting further physiological tests that measure the element of composite balance and conducting more relations between balance and the sensory factors that control it. Reliance on the use of modern and rated lab systems to determine the level of composite balance and sensory analytics that control it such as equi test system. Referencing the scientific bases that were used in design of the program of improvement of composite balance and reliance on the physiological and mechanical factors to determine the actual balance of the player. Attention to conducting further common research in the fields of sports and medicine, including the design of rated training programs through the tests of vestibular system. To foster the application of the proposed programs in all sports foundations in general and diving sports in particular because of their effective role in the improvement of skill performance level. To conduct further research in the other sports activities that reply on the vestibular system as main factors that affect the skill performance level.