Abstract in English  The aim of this study is to identify the effectiveness of rehabilitation exercises in conjunction with aquatic therapy for those suffering from sacroiliitis in football players. The researcher used the experimental approach, using the experimental design (pre-measurement, post-measurement). Similar to the objectives and procedures of the research, the researcher assumed the following: the existence of significant differences. Statistics between pre- and post-measurements in variables in favor of post-measurement for the following variables (degree of pain and level of balance). The experimental approach was used with a pre- and post-measurement design on one group of football players with sacroiliitis, numbering (8) players whose ages ranged from (20 - 25 years). The program was applied for (8) weeks with (5) sessions in The week, the program included rehabilitation exercises inside and outside the aquatic environment, and the results of the research were. - The rehabilitation program prepared with hydrotherapy helped improve the general condition of the body and gradually disappear the feeling of pain in the joint clearly. The use of hydrotherapy led to the disappearance of the feeling of pain and thus had a positive effect on performance Prepared rehabilitation exercises and making the injured feel comfortable and improving the psychological state of the injured. - The prepared rehabilitation program has a clear effect in improving the balance of the muscles working in the pelvic joint. The exercises carried out clearly helped in the injured person's return to playing football normally. - Using rehabilitative exercises accompanying hydrotherapy has good results, better than applying only rehabilitative exercises. Recommendations: - Paying attention to following the rehabilitation program with hydrotherapy when football players suffer from sacroiliitis in order to avoid deterioration of the patient’s condition. The researcher also recommended using rehabilitative exercises with hydrotherapy and employing it consistently within rehabilitation programs for all pelvic joint injuries. - The researcher recommended the importance of functional tests as a criterion for the player’s return to playing football. - She pointed to the diversification and expansion of special research into the prevention of pelvic joint injuries using modern means and devices.   Keywords: sacroiliitis, hydrotherapy, degree of pain, and instability.