Among the person who want to insure, there are not only fair persons who want to become the insurance with not realizing that one was not infected with certain disease but also someones on purpose to overcome the disease through the insurance company with be recognized by oneselves. However, it was found that the ultrasonography and exact effects of medical examination with the existing medical equipments of the insurance company could not be expected. We present some several proven examples for the purpose of getting the advanced effects in medical examination by utilizing the ultrasonic device which is not harmful to human body presently as far as known. We could find affirmation through the check of ultrasonography from 907 cases, in our Department of Medical selection that many portion of the cases checked the medical examination have the present condition of illness even though they enjoy social life with good health and finally the conclusions we have learned are as follows; The aged cases show the increase of rate of possessing disease and man shows 2.2 times of possessing disease than woman. Fatty infiltration of liver take portion of 74.7% from the case checked. 12 cases of cholelithiasis are not conscious of symptom at all. Through the check of ultrasonography in obstetrics and gynecology, myoma uteri be showed high rate of 72.2% from the case of possessing disease. In Case of the potential pregnancing woman it made clear to find pregnancy which was undistincted still more also know the existence and nonexistence of fetal death when pregnancy expected.