This study was to investigate the ultrasonographic liver fat density , obesity index, and serum lipids. One hundred and one (43 males, 58 females)healthy adult subjects were examined using anthropometric indices, biochemical measurements and ultrasonography. The average levels of ULFD, TC, TG, HDL-C, LDL-C were 122.4mg/dl, 201.1mg/dl, 144.9mg/dl, 49.8mg/dl 122.3mg/dl, respectively for males and 117.9mg/dl, 199.1mg/dl, 130.6mg/dl, 50.6mg/dl, 122.3mg/dl, respectively for females. Males had higher levels of ULFD, TC , TPH, LPH and AI than the females but the differences were not significantly. LDL-C, TC , LPH, TPH and AI of obese groups by KI were significantly higher than those of nonobese groups. Ultrasonnographic liver fat density showed positive correlation with BW, W/H and TG. Objective measurement of ultrasonographic liver fat density is useful for the parameter of obesity.