The use of clay walls on bamboo lathing less burdens on the environment, but it is necessary to confirm their properties in order to use this wall construction method more widely in safety. In this paper, these properties are measured, including workability, crack and compression characteristics. Tests result in the followings conclusions. In the case of wall clay for the base coat layer, when fiber content increases, elastic modulus and compressive strength decreases, but the two layers across bamboo lathing become monolithic, and toughness is improving. In the case of the middle coat layer, to keep a high level of compression characteristics require minimum amount of straw to avoid cracking.