The arthroscopy of the temporomandibular joint (TMJ) is recently recognized as the useful diagnostic manner as well as the alternative surgical procedures in the treatment of TMJ internal derangements. Arthroscopic surgery of the TMJ, which consists of arthroscopic sweep with lysis of adhesion and lavage of the upper joint compartment, is simple and less surgical invasive manner for the patient with closed lock. The instrumentation, procedure, patient management, and clinical evaluation are described.