We are concerned with examining the effects of crystal color boards on personal space. Seven color boards were used for examining the """"approaching to other"""" and """"other's approaching"""" conditions. Thirty female and 30 male subjects participated in the experiment. The experimental design was pair (female-female, female-male)×approach condition (2)×color board (no-board and 7 kind of color). The latter two were repeated measures. It was found that male subjects showed a broader distance when they began to feel uncomfortable about closeness as females were approaching them than when they themselves approached females. On the other hand, females responded with a narrower distance for both """"approaching other and other's approaching"""" condition. The effects of """"with or without"""" color boards, """"nervousness for partner's gaze"""", """"restlessness"""", """"getting tense"""", """"becoming anxious"""" and """"feeling ill at ease"""" were observed significantly more in """"without"""" color boards than """"with"""" color boards.