Abstract: A first story log house material is adhered to a base with a coach bolt and succeeding log materials after a second story are piled up in turn with clamping bolts. A coach bolt or a clamping bolt has a height corresponding with one long thickness and is equipped with a nut portion and a wahser. This method of assembling log walls for the log house eliminates the accumulated shrinkage for the log wall during the drying period. Thus, by the present invention, it is now not necessary to prepare some large size of a side adjusting device and also to reserve some large settling space, both of which are unavoidable in prior art.