This study aims to comprehend the characteristics of fishermen's houses and fishing villages in the southern area of Hokkaido. I surveyed twenty fishermen's houses and analyzed archives about private ownership of land. The results can be summarized as follows. 1. There are 2 types of fisherman's house, one was used by independent tangle-weed fishermen and the other by headmen who manage sardine-seining. The plan of the former consists of a public front part and a private back part, while the latter has a private front part and a public back part. 2. In the 17c-18c, the typical subdivision of tangle-weed fishermen's plots into long and narrow sections was established in Zenigamezawa village. The wide-frontage section of fishery ground for sardine-seining was laid out in the mid-18th century or later.