This study focused on the body composition of Korean Basketball Players in Dual X -ray Absorptiometry. The principal subjects of this study were 10 Basketball Players who participated in the process of Dual Energy X -ray Absorptiometry at K.H. University Hospital for 8 months from Sept. 1. 1996 to April, 30. 1997. On the basis of the these measurements, the authors calculated physical indices and total fat percent. On the results of bone densitometry, the author analyzed body fat weight, body composition according to body position, bone mineral density and discerned the difference between the fatness which was calculated indirectly and which gained from the bone densitometry. 1. General Characteristics The mean age of the subjects was 20.4$ imes$1.35 year. 2. Physical. Measurement The mean physical growth and development of the subjects were superior to standard value of the average Koreans 3. Body Fat by Physical Measurement Body surface area was 2.019$ imes$0.111$m^2$, body volume was 74.4$ imes$7.2$ell$, body density was 1.041$ imes$0.007$ell$/kg, and body fat percent was 24.9$ imes$2.9%. 4. Body Fat by Bone Densitometry Total body fat percent was 15.17$ imes$2.19% and according to body position that of upper limb was 1.62%, that of lower limb was 5.55%, that of trunk was 7.06% and that of head was 1.05%. There was significant difference between the amounts of body fat from the methods used in this study; that from physical measurements and from bone densitometry method could be said most desirable. 5. Body composition According to Body Position Trunk was highest at 46.7%, lower limb was 36.0%, upper limb was 10.6%, and head was 6.7% in order. 6. Bone Mineral Content and Bone Density In bone mineral amount by body position, that of upper limb was 466.9$ imes$46.4g, that of lower limb was 1,424.1$ imes$154.0g, that of trunk was 1,343.0$ imes$150.3g, and total bone mineral content was 3,786.8$ imes$348.4g(4.78$ imes$0.13%). Bone mineral density by body position, that of upper limb was 0.758$ imes$0.072g/$ extrm{cm}^2$, that of lower limb was 1,342$ imes$0.095g/$ extrm{cm}^2$, that of trunk was 1,169$ extrm{cm}^2$0.082g/$ extrm{cm}^2$, that of head was 1,742$ imes$0.154g/$ extrm{cm}^2$ and total bone mineral density was 1,204$ imes$0.077g/$ extrm{cm}^2$.