In this paper, PART-2 in a series of Experimental Study on Measurement of a Sense of Oppression by a Building in Experiment III, by means of the quantitative treatments of sensation-psychometrical treatments, we mention about the sellection process of the physical value that has the most suitable and explanatory ability for the psychological content of the sense of oppression caused by a building. As a general result, it was obtained that the sense of oppression is explained by a look of a building shape, namely the solid angle factor of a building. However, it became clear through further analysis that the configuration factor-the value that weights height element-is more suitable and explanatory physical value for a sense of oppression than the solid angle factor of a building. Experiment IV is the trial of the proposal of the equation for estimating the sense of oppression by means of the statistical process. Considering strictly the data obtained from Experiment III, we found the limiting the object of the study into a housing area rather than into any other areas is to be most essential for this study. In Experiment IV, by classifying the housing area into three typical patterns, we could indicate the most fitting and stable correlation between a sense of oppression and the configuration factor. Besides, in this Experiment IV, we adopted the composed picture method, namely montage method, therefore, we could control the situation and the physical value. As a result, in spite of the difference among three typical housing areas, the equation for estimating the sense of oppression caused by a building in housing area is indicated as follows; ψ=30.2c^<0.80> where, ψ : a sense of oppression caused by a building c : configuration factor of a building The contents of this paper are indicated below : 1. Introduction 2. Sellection process of physical value-stimulus variable 3. Experiment III : Relation between physical value and the sense of oppression by a building a) Solid angle factor of a building shape b) Discussion on a visual field c) Solid angle factor and a sense of oppression d) Relation of a sense of oppression to configuration factor 4. Experiment IV : A sense of oppression by a building in housing area a) Method of this experiment b) Result 1. Effectiveness of the evaluation of a sense of oppression c) Result 2. Surroundings in housing area and a sense of oppression d) Result 3. Psychological consideration of a sense of oppression 5. Conclusion of this paper