The purpose of this study was to confirm the effects of girdle on the physiological responses and the microclimate in summer. The measuring points were rectal temperature, skin temperature, pulse rate and sweat volume as physiological responses and the inside clothing temperature, relative humidity as microclimate when the subjects wore girdle (girdle A; polyurethan+nylon, girdle B; polyurethan+cotton) for the period of rest and exercise in climate chamber. The enviromental conditions were at 25℃ (65±5% RH) and 30℃ (75%±5% RH). The results were as followings. 1. Mean skin temperature increased in girdle during the exercise at 30℃. 2. The pulse rate decreased in girdle during the rest at 25℃. In the case of girdle A, it was remarkably decreased. Rectal temperature increased in girdle A and B during the exercise at 25℃. But the kinds of girdle didn`t affect the pulse rate and rectal temperature. 3. The total sweat volume in girdle was larger than in control. 4. The difference between skin temperature and inside clothing temperature of abdomen had a tendency to increase at all experiment condition. 5. The relative humidity of inside (RH_1) and outside (RH_2) of girdle increased in girdle during the rest at 25℃ and 30℃. And the relative humidity of wearing girdle B was higher than girdle A during the rest at 25℃ and 30℃. The RH_1 after stepping at 30℃ was the highest in girdle A and the lowest: in control. From this point of view, we concluded that physiological responses and the microclimate were affected by wearing girdle. And mean skin temperature and relative humidity of inside clothing were affected by the materials of girdle.