Four thatched roofing wooden houses yet remain in Minehama village of Akita prefecture. The authors investigated the woods used for those houses and examined how to use woods in construction of modern rural farm houses. The results are summarized as follows: ・To select a wood with appropriate dimensions suitable to each member out of available ones had frequently priority over the important principle that suitable wood must be used for suitable member when considering both characteristics. ・Reused woods were often utilized, and thus to build structures adjusting to reused wood dimensions took often precedence over the mechanical rationality of frames.
