The purposee of this study is to investigate the correlation between the horizontal and vertical discrepancy of facial bones and the horizontal and bertical position of glenoid fossa. For this study, the cephalograms were taken to the adults over 10 of age(96 men and 108women). The cephalograms were divied into three groups according to the ANB angle(below 0.5 degree, 0.5 to 4.0degree and above 38 degree), and they were divided into three groups according to the SN-MP angle(below 30 degree, 30 to 38 degree and above 38 degree). The following conclusions were obatained: 1. In the horizontal discrepancy of facial bone(ANB), the horiontal position of glenoid fossa(X) was anterior position as the order of Class Ⅱ, Class Ⅰ, ClassⅢ. 2. The horizontal position of glenoid fossa(X) showed the significant correlation with ANB and SNB, but not with SNA. 3. In the vertical discrepancy of facial bone(SN-MP), thee less anglee was the greater vertical position of glenoid fossa(X) and wad followed by the medium and high angle in order. 4. The vertical position of glenoid fossa(Y) showed that the SN-FH was the most significant correlation, and it was followed as the order of SN-FH, SN-MP and SN-OP angle. 5. There was the samllest length of anterior cranial base in the Class Ⅲ malocclusion.