Developmental hip dysplasia (DDH) is still one of the most important diseases of childhood, although its frequency has decreased with screening programmes. Open reduction techniques are the first surgical option in children under 18 months of age for whom the closed reduction and plastering was unsuccessful. Unfortunately, avascular necrosis is a feared complication after surgery. One of the biggest innovations in the treatment of DDH in recent years is the arthroscopic treatment option. Structures preventing reduction can be eliminated with arthroscopy, which is a more minimally invasive technique. Although the fact that arthroscopic hip joint reduction requires experience in both paediatric orthopaedics and arthroscopic surgery seems to be the biggest obstacle to the widespread use of this treatment, studies on this subject are increasing day by day. It draws attention as an alternative technique to open surgery in children under 18 months of age in whom closed reduction is not successful.