Abstract
This study clarifies how the alteration through the inflow of the external space can be assimilated to the internal space. The inflow of the external space into the internal space is in contemporary architecture already widely accepted. For this purpose, ways of the inflow will be classified at first into three types: 'open space', 'semi open space' and 'closed space'. Then these will be divided in turn, by applying them to the plan, into several subtypes according to the particular open space. The features of surface, in which not only the physical but also the nonphysical relation such as the permeability of glass are considered, should be analysed. To grasp the features of the influence of the inflow of the external space, following things will be illustrated: ways of space division, ways of demarcation, the relational structure between spaces, ways of the inflow and the relation of the inflow elements to space characters. Therefore the relation between the internal and the external space, ways of controlling of the inflow elements and utilization plans will be revealed. This analysis about the influence of the inflow of the external space can be applied as a manual for designing contemporary houses in respect of the logical relation of causality.