In daily life we can find an aspect a human being percept 3-D space which surrounds him/her in using properly demonstrative pronouns "KORE, SORE, ARE". By this study, we did the life-size experiment and made clear the three-dimensional form of domains of demonstrative pronouns "KORE, SORE, ARE". A result of an experiment is as follows. 1) Height of the domain of demonstrative pronoun "KORE" was about 2400mm. 2) Height of the domain of demonstrative pronoun "SORE" was about 2800mm. 3) There was the domain of demonstrative pronoun "ARE" in the outside of "SORE". 4) The domain of demonstrative pronoun "KORE" was related to the movement of the body. And then we illustrated form of 3 dimensions of demonstrative pronoun "KORE" and calculated the capacity. It was about 10 cubic meters. We were able to get a result of demonstrative pronoun "KORE" to be quantitative expression of the psychological self domain. And it was suggested that the domains of demonstrative pronoun "KORE" was one of the psychological unit space in spatial planning.
