Kentaro MORITA-ーーーー * 1Suguru MORI-ーーーーーー * 2Authors developed computer software for simplified simulation of thermal environment of glassed-in spaces. By using the software, this paper shows how to adjust the temperature of glassed-in spaces through the methodical analysis in different design conditions and climate conditions. It is found that the software is useful for designing of glassed-in spaces when the architect cannot empirically predict the thermal environment by changing design conditions. Besides, the software is especially useful in reduction of time and labor when the architect makes various studies and inputs many different conditions on the early stage of designing. Authors developed computer software for simplifi ed simulation of thermal environment of glassed-in spaces. By using the software, this paper shows how to adjust the temperature of glassedin spaces through the methodical analysis in different design conditions and climate conditions. It is found that the software is useful for designing of glassed-in spaces when the architect cannot empirically predict the thermal environment by changing design conditions. Besides, the software is especially useful in reduction of time and labor when the architect makes various studies and inputs many different conditions on the early stage of designing.Kentaro MORITA 1 Suguru MORI 2 1 2