Spinal dysbarism is an accident caused by nitrogen bubble affecting the spinal cord of divers. Paraplegia or quadriplegia may occur as a result of those miseries. Once careless divers ascend to surface too quickly, nitrogen bubble will obstruct fatty tissue in the spinal cord directly or occlude epidural vertebral venous system (EVVS) via periphral tissue and blood vessel. Peculiarity of EVVS in anatomy and physiology contributes to nitrogen bubble easily accumulated, and relative cardiopulmonary reaction aggravate obstruction accordingly. Most of the manisfestations appear within 24 hrs, and patient might experience sensory impairment, pain, weakness, paralysis, incontinence, etc. Main therapy depend on hyperbaric oxygen therapy for recompression. The earlier the hyperbaric oxygen therapy given, the better prognosis of patients will be. In spite of recompression therapy, rehabilitation is also important for educating and training patients. Prompt diving hygiene should be emphasized to prevent unnecessary accident.