This study analyzed the geographic proximity between generations to support the generation-friendly housing support policy that solves the social problems of the low birth rate and aging age. A fixed-effect panel logit model has been developed with 2nd~6th KLoSA data for elderly parent households and adult children’s households. Analysis results indicate that common effects are as follows. The geographic proximity between generations is high during the physical decline period in the life cycle of elderly parents and rearing period in the family life cycle of adult children. The geographic proximity between generations is low when living with children in the elderly parent household. On the other hand, the discriminatory effects in urban areas were the economic constraints of elderly parents and the time constraints of adult children. Accordingly, the implication are as follows. First, it is confirmed that overseas studies findings are also applied in korea. Second, it is judged that the family function is performed despite of nuclear family society. Third, it can be used as basic data for the generation-friendly housing support policy plan.