The relationship between delayed traumatic intracerebral haematoma and disseminated intravascular coagulation was investigated. Eighteen patients with delayed traumatic intracerebral haematoma were selected as the study subjects from 268 consecutive patients with head trauma and compared with another two groups of patients with closed head injury (20 cases) and with multiple injuries (24 cases). All cases had six laboratory studies for disseminated intravascular coagulation for 7 days. The results revealed no different clotting abnormalities among the three groups. From the laboratory point of view, it could be concluded there was no essential relationship between disseminated intravascular coagulation and the appearance of delayed traumatic intracerebral haematoma.