For the better orthodontic diagnosis case analysis, and treatment plan, the author studied the cephalometric analysis 365 Korean with normal occlusion occording to the Steiner and Tweed analysis. The subjects consisted of 162 males and 203 females from 7 to 19 years with normal occlusion and were divided into three groups according to the Hellman´s dental age. The results were obtained as follows; 1. The Ideal Acceptable Compromises were determined after measurement of male and femle average by the Steiner analysis in Hellman´s dental age III B, IV A, IV C group. 2. The Holdaway ration were 6.5 : 1.0 in Group I, 6.5 : 1.5 in Group II, 6.5 : 1.5 in Group III. 3. The Tweed´s triangle were FMA 27° FMIA 58° IMPA 95° in Group I and II, FMA 27° FMIA 62° IMPA 95° in Group III.