This thesis aimed to provide data necessary for our national public health administration and the screening of the fat people by presenting the normal value of body fat on a basis of the mean value of body fat. The subjects were 87 male adults ranging from 20 to 27 years of age when their physihue and organ reach full growh, and 199 female adults 20 to 45 years of age. The mean value was obtained by measuring body height, body weight, chest of girth, and sitting hight; by determing body fat based on under-water weight measurement; by taking the measurement of subscapular, abdomen, lumber and upper arm. The results obtained were as follows.