抄録
This study aims clarifing the origin of Family Room and the formative process of Dual Living Plan in American house. The findings are as follows. It is said by several researchers of the house history in USA that Family Room first appeared in Parents' Magazine in 1947. However We could not find that story in Parents' Magazine in 1947. We found only similar name which is Rumpus Room, Play Room and so on instead of Family Room. We discovered the name of Family Room in certain house plan on the Better Home and Gardens in 1948. Also the similar concept of Family Room already had appeared as Play Room in 1920's or Multipurpose Room in1930's. It suppose Dual Living Plan which is composed of Living Room and Family Room had been established by early 1960's by way of the embryo period and the trial period.
