Clinical pictures of the infants with dysacousis and psychosomatics are markedly variegated, and their physical developments are mostly unbalanced. Recently, the authers performed profile-observation on the mental development of the infants with physical deficiency, who are not under the special education.87 cases with typical abnormal symptoms among 136 cases (0-7 years old), were employed (a case materials).They were classified into 23 cases with neurotic dysacousis, 30 cases with mental retardation, 21 cases with mental retardation complicated with dysacousis, 10 cases with cerebral palsy, 3 cases with cerebral palsy, 3 cases with cerebral palsy complicated with dysacousis.The test-method employed were audiometric tests such as startle respons-audiometry, COR-audiometry, play-audiometry, standard-audiometry as well as mental development tests for babies and infants issued from Aiiku Research Laboratory.In summary, the authors recognized slight, medium and marked features among the cases with main symptom of neurotic dysacousis, and development-profile of deafness as well as the main symptom of mental retardation and cerebral palsy and accompanie with dysacousis. and the authors discussed development-profile on each symptom.