This study was conducted to investigate the effects of light intensity and temperature on the physiological characteristics and growth of ginseng leaves. The higher the transmittance of the shade, the greater the area was decreased. In contrast, however, the amount of transpiration was increased. There was no significant difference in the number of stomata, but the size of stomata was distinctively decreased. The higher the transmittance of the shade, the more the contents of total chlorophyll, chlorophyll a and b, and cartooned were decreased. In contrast, however, the aye ratio of chlorophyll was increased. Regardless of temperature, the contents of chlorophyll providing maximum photosynthesis at the end of June and August were 2.1mg and 1 8mg/g F.W. respectively.