A nutritional study of neurotic anorexia has been carried out and the following results were obtained. 1) Patients in this category, without exception, mainly complain about lack of weight and anorexia and they are neurotic. Light disturbances of gonad and hypophysis are observed. Psychologically, they are of marked individuality, aggressive in nature, egotistic and excitable. Concerning food, they order only the amount they want or sometimes prepare it themselves. 2) Concerning quality of food, total calory is little but many in variety. Protein is usually over 1.5g/kg but sometimes is over 2.0g/kg and animal protein is generally over 70%. When the intake of calory increases, the quantity of rice and bread increases and the ratio of protein compared to the total calory decreases. Water intake is very little. 3) Even if patients are emaciated, they withstand the stress, common cold and infectious diseases and disturbance of organ function is less. It can be considered that they are able to maintain minimum healthy livelihood is due to high protein and high fat food although the total calory is low. This is the point that is different from the malnutrition in which both the protein and the calory are low. 4) It is considered that this illness exist as disease because they are able to live long even under low nutritional condition owing to the fact that although the total calory is low, intake of protein, fat and vitamin are rich. Accordingly, when the circumstance become bad and the food condition become poor, they gradually become malnutrition.