An electric stimulator that effectively improves the brain function of patients suffering from brain disorders by applying electric stimulation to the brain of the patient effectively. The electric stimulator can include main electrodes H to be stuck to particular sites of the patients body extending from the neck part to the head tip part. The particular site may be the temple part, the forehead part above the eyes, the cheek part and the rear neck part. The electric signal to be applied to the main electrodes H is set so as for weak electric current of 100 μA or less to flow through the patients body and stimulate the brain. In addition to the application of electric stimulation by the main electrodes H, auxiliary electrodes S may be stuck to the back of the patient.
