Summary: The choice of the optimal method of surgical treatment of the habitual dislocation of the patella is one of the urgent problems of modern orthopedics. This is evidenced by the existence of more than 160 methods of operations. The ultrasound diagnostic method is non-invasive, affordable and quite informative, especially when choosing an operation. The article presents the results of ultrasound examinations to study the characteristic changes in the elements of the knee joint in this disease. A survey of 219 patients operated on using different methods was performed. According to the results of studies, it was found that ultrasonography is one of the methods for diagnosing the habitual dislocation of the patella, which provides the possibility of multiple dynamic studies and postoperative observation.