Mechanism of brain injury in dysbaric diving accident is controverial but likely are due to arterial gas embolization. We reviewed 6 CT cases among 4 patients of brain injury in dysbaric diving accident and evaluatedthe role of CT. Among 4 patients, we can see diffuse low density in cerebral white matter in 2 patients, focal low density in cortical and subcortical area of right frontal and left temporopatieral lobe in 1 case, and normal CT finding in 1 case. And we convinced that combination of MRI and follow up CT is useful for the evaluation of neuropathologic process and progress of injury during management.