Natural ventilation has the effect on improving the comfort of the indoor environment. However, this effect has not been clarified since it is difficult to artificially reproduce the same airflow as natural cross ventilation. In this study, the psychological and physiological effects of fluctuating airflow on the human body in hot summer environment were evaluated. The subjective experiments were carried out in a climatic chamber with fluctuating airflow generator, which can generate three airflows with different properties. The following results were obtained. (1)The thermal comfort is obtained by the natural cross ventilation most. Even after the airflow stops, the thermal comfort can be maintained. (2)The allowable environment can be reproduced by using the fluctuating airflow in a hot environment. Especially, the natural cross ventilation is psychological and physiological effective.%定常風、周期変動風、自然通風を再現できる気流発生装置を開rn発し、性状の異なる気流をパラメータとした被験者実験を行うことで、rn夏季の暑熱環境下において気流が人体に与える心理的・生理的影響をrn評価した。また、リアルタイムで連続的に申告する方法を採用すrnるで、非定常状態の検討に適用できる可能性を示した。被験者実rn験から得られた主な結果は次の通りである。
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