This chapter discusses temporomandibular joint disorders. Craniomandibular articulation is a complex synovial system composed of two temporomandibular joints (TMJs) together with their articular ligaments and masticatory muscles. Each articulation comprises of two joint compartments, i.e. upper and lower, that provide for combined hinge and sliding motion. Temporomandibular disorders are classified according to their clinical symptoms into five classes such as masticatory muscle disorders, disc interference disorders, inflammatory disorders of the joint, chronic mandibular hypomobilities, and growth disorders of the joint. Signs, symptoms, and management of temporomandibular joint disorders are also discussed in this chapter.