"IntroductionWe often walk in urban environment after obtaining information such as a map. However, when actually walking, we often have the experience that cannot discover the cues learned on the map. In case of losing sight of the cues for the destination, we are confused and feel uneasiness. And the disorientation appears by feeling confusion and uneasiness through wayfinding behaviors. Recently, the study based on the disorientation mainly focus on physical factors to environment, and psychological factors to environment do not focus on very much. Therefore, though the disorientation is the sense that anyone feels, it is the vague concept that is not defined clearly. PurposeThe purpose of this study is to clarify the psychological structure to the disorientation based on the degree of uneasiness through wayfinding behaviors. MethodThis is the experimental study through wayfinding behaviors. The subjects do not have the direct or indirect knowledge about the proving ground. The checkpoints are installed sequentially for the destination in the proving ground. After tracing all the checkpoints, the subjects must arrive at the destination. During wayfinding behaviors, the subjects call "disorientation" and "uneasiness" in the point which the psychological change appeared at any time. And, the subjects put on eye-fixation camera during wayfinding behaviors to extract the physical environment that they eye-fixed. After the end of experiment, the subjects are interviewed about strategy for the destination and the degree and reason of uneasiness in the psychological change point. Results and Conclusions(1) Transaction of the disorientation and uneasinessWhen the subjects are not able to discover the cues for the destination, the degree of uneasiness increases. The disorientation appears when the degree of uneasiness became the highest. And, the highest degree of uneasiness continues until a discovery of the cues for the destination.(2) Visual search while the disorientation continuesWhile the disorientation continues, characteristics of visual search differ from the usual ones. After the disorientation appeared, the subjects especially try to eye-fix many cues than the usual case. Therefore, the average time of eye-fixation tend to decrease.(3) The strategy after the disorientation appearedAfter the disorientation appeared, the strategy of wayfinding behaviors shows two tendencies. When the subjects could not discovered the cues through wayfinding behaviors, They are divided into the group going and coming back to the route where they have walked and the group walking various routes."