In this paper, applying several kinds of adhesive waterproof paper to a wooden lath-mortar external wall was suggested. The adhesive waterproof paper has an adhesive layer and elasticity. Therefore, it is thought that the wall which is applied adhesive waterproof paper has performance to prevent exfoliation of mortar caused by earthquake. In addition, it is thought that the durability of the wall improves. For the purpose of evaluating the effect by the application of the adhesive waterproof paper, some evaluation experiments were performed. As a result, it was cleared that the adhesive unity against the off-plate direction force and the rust prevention of staples of the wall which was applied adhesive waterproof paper can be improved.