CLT is initialism of Cross Laminated Timber. CLT is generally large-sized panel which can use many woods efficiently, so it is attracted attention recently in Japan. Therefore, many studies about CLT are carried out. However, there are few studies about durability of CLT. Avoiding water infiltration is important for durability of wooden building. CLT has many edge-glued points which has risk of water intrusion due to capillary phenomenon. So we focused on water absorption from the bottom end of the wall by accidental water infiltration. In this study, water absorption from the edge-glued point of CLT was experimentally verified. As a result, the following was clarified. 1. A water stay at the bottom part in case the fiber is in the transverse direction. 2. Water reaches the upper part in case the fiber is in the longitudinal direction because of probably capillary phenomenon.

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