On the importance of brain, Nei Ching has many descriptions, but it has been 3,000 years since the theory was issued that brain should be considered as a viscera. Nowadays scientists rush more studies on brain in international scientific field, Eastern medicine is to be required for the solution of it. This study is on the identical pathological mechanism between Simpo and brain based on my researches on senil dimentia through continued reports last 15 years. A psychosis is caused by stress and abnormality of neurotransmitter on brain, for which is caused by seven emotions and pathological material on Simpo in Pyun Jahk Simseo, so it shows Simpo is brain clearly. Therefore Simpo is no more intangible organ but brain, Samcho which has been debated similarly for thousands of years in the orient is no more intangible but spinal nerve system on central nerve with its structure and physiological points, and both two organs are composed of inside and outside relationship in Eastern medicine, I report hereby today.