This study focuses on sweating reactions in the lower body, which is one factor affecting discomfort in the sitting position. We first investigated sweating distribution in 13 sites on the lower body in 5 young women in an environment of 35℃ and 50% relative humidity. There was a general tendency for the volume of sweat from the lower body to increase near the trunk. We then changed the positions of 8 young women from standing (a) to sitting to standing (b) in an environment of 35℃ and 50% relative humidity, and measured their sweat rates at 5 sites. Sweat rates differed markedly, depending on the postural changes: standing (a) → sitting, -20 to -30%; sitting → standing (b), +45 to +70%. Sweat rates on the buttocks were low compared with neighboring areas, and were extremely low when the subjects were seated.