SUMMARYThe establishment of a Mobile Resuscitation Unit based on a District General Hospital is described. The Unit is manned by hospital-trained ambulance men and by an anaesthetist when necessary. The training of the ambulance men, organization of the service and the results are discussed. The authors recommend the establishment of such a unit in association with an urban district general hospital for the immediate care of all patients who suddenly become seriously ill, regardless of the cause of their illness or accident.