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An urban heat island is one of the factors that cause a climate change to become more critical. Bangkok is one of the mega cities in the world in which urban areas have been affected by the urban heat island, especially the inner area of Bangkok and its CBD. The survey data from a satellite confirmed the hypothesis of the affected area in the inner zone of Bangkok. From the study it has been found that the urban heat island problem in the urban area of Bangkok was developed by the augmentation of its physical surroundings of all the man-made construction. The findings of the research show similar physical conditions and characteristics of the urban elements that caused the urban heat island in the area: the building masses, the building alignments, the street patterns, ground paving and its condition. It would be useful to find out if there are any suitable answers for the spatial development characteristics that would be possibly reduce or control the urban heat island problem in the inner area of Bangkok.