This study was attempted to examine the results of M. M. P. I. with Rorschach test results of schizophrenics 44 (male 30, female 14) and neurotics 25 (male 13, female 12) in regard to the symptomtypology from a psychodynamic viewpoint. If the patient-groups of both diseases are classified into so-called negative and positive symptomtypes, the scales of the personality profile on M. M. P. I. showed generally low scores in the former and high scores in the latter by both diseases. Personality changes caused by schizophrenia and neuroticism were Gimiliarly shown as indicated by the quantitative deviation from the average mark of normal population on M. M. P. I. Therefore, two mechanisms (negative and positive symptoms) of so-called Neo- Jacksonism in each disease might be expressed similiarly on M. M. P. I. delete. In the Rorschach Test the value marks of Piotrowski's prognostic perceptanalytic signs were remarkably different in schizophrenics according to the degree of deterioration of their personalities, but in neurotics the value marks were largely similiar to those in schizophrenics of better prognosis. Schizophrenics were classified into 4 types from the psychodynamic aspect by combining the positive or negative nuance of symptom and the severely or sightly deteriorated degee of personality. This typology might coincide with the classification by combining the high or low personality profile- pattern on M. M. P. I. and the large or small value mark of Piotrowski's “prognostic perceptanalytic signs” in Rorschach test. It may be mentioned also with reference to neurotics, when Eichler's anxiety index was applied to both the positive and negative symptom-types, some of the item scores were high for the positive type and some were high for the negative type. Thus, it was possible to separate with considerable accuracy the two groups.