Abstract
After Kaitakushi period, Dairy barn with gambrel roof was transplanted in Hokkaido from USA. There are many Farmers’ Bulletins by U.S. Department of Agriculture in Hokkaido University Library and in National Agricultural Research Center for Hokkaido Region, which presented the Dairy barn with gambrel roof. And also, there are some books that presented the construction and the ventilation for Dairy barn with gambrel roof. Those books for farm building from USA and USDA Farmers’ Bulletins were referred for the introduction of Dairy barn with gambrel roof.