The human body is a senser in wearing test. In this paper, the body and skin temperatures on the same subject were measured repeatedly (28 times) under the same thermal condition, and the intra-inter individual differences were examined in order to clarify the reproducibility of the sensor. Subjects were three healthy female students. They, wearing of overall type clothes of 1.21 clo, were exposed for 1 hr at 20°C in room temperature, and they almost felt comfortable under this condition. The results were as follows : 1) Skin temperature distributions obtained in this study (20°C, 1.21 clo) were much lower in head and slightly higher in trunk and extremities than the results obtained in previous study (28°C, 0 clo). But there was no difference of mean skin temperature, 33°C, between two studies. 2) Rectal and mean body temperature showed the least intra-individual differences, and mean skin temperature followed them. 3) Among the local skin temperatures, intra-individual differences were small in epigastrium, thigh, leg and back, and were large in toe, foot, cheek and finger. 4) Inter-individual differences were large in back, epigastrium, forearm, mean skin and finger and were small in foot, cheek and upperarm.