In our time, there are various family which are single-person-househoIds, nuclear family and extended family, etc.. In this paper we will clear up the lifespace of the extended family at rural house by researching the relation between the unit of family and lifestyle of 17th extended family. We cleard as follows: 1) The extended family inherit customary lifestyle which are eating, cooking, conversing and holding ceremony together with family. As another, the husband and wife or chiIdren of the extended faraily eat, cook, hold conversation and receiv by oneself. 2) The extended family inherit the mutual aiding that is customary lifestyle, Each member of family has one's part and helps to each other. 3) The extended family put much value on the living with extended family. 4) We conclude that the living with extended family will be inherited.
