This study was undertaken to quantify the effects of exposure of women in nearly nude under 22-34°C thermal conditions for 2 hr on the whole and the regional mean skin temperature. Subjects were five healthy students. The whole and the regional mean skin temperatures were estimated from contour maps of thermograms by the equation previously reported.Devided skin surface regions were as shown in Fig. 1. Following results were obtained. 1) Whole mean skin temperature increased at a rate of about 1.6°C with each air temperature step of 3.0°C under the conditions of 22-31°C, but at 34°C, at which sweat rate showed a sudden increase, individual variances were so large that the mean change was a little. 2) Patterns of regional mean skin temperature change were classified into two types, the one such as face, neck and trunk showed relatively constant temperature at 22-31°C and decrease at 34°C, and the another such as limbs showed extensive increase at 22-34°C. 3) The effects of perspiration on the figure of thermograms were more in the trunk than in the limbs. 4) Mean skin temperature of the limbs were higher in flexion side than in extension side. 5) Both hand and foot showed the largest changes of all the regions and the temperature gradient from arm to hand and from leg. to foot were inversed at 28°C and at 29°C, respectively.