In this review, function, anatomy and pathology of the sternoclavicular joint is described. Arthritis as part of a rheumatological condition is treated medically; persistent synovitis can be treated by synovectomy. Infection is most often caused by Staphylococcus and is treated by debridement and antibiotics. Painful degenerative conditions can be treated by arthroscopic or open debridement, medial clavicle resection and resection of osteophytes. Instability can be traumatic or non-traumatic and is treated by a stabilising operation. Generally, results of treatment are positive.