Abstract
Stucco is known as a material which can adjust temperature and humidity from ancient times. This material is observed as an effective material to the problem of the sickhouse which poses a problem in recent years. This research verified the effect using the small material test and the model room for the effect of aldehyde and VOC of stucco. Consequently, although aldehyde and the effect of VOC were accepted, it turns out that the difference by the chemistry substance is also produced.