"Iyashi" (we never use "Healing "and "Healed "instead of "Iyashi"and "Iyasareru"respectively)is a term that everyone often hears of in Japan. When people get depressed or feel down, they usually want "Iyashi" so as to gain satisfied or peaceful mind. For the purpose of the engineering application, we have already defined Iyashi as the stimulus that restores peaceful mind from the loneliness or nihility mind. However, the essence of Iyashi has not been clarified. Our target is to clarify the physical and psychological structure of "Iyashi", to generate "Iyashi" by the engineering methods, and to provide "Iyashi" for the people to keep their minds peaceful any time in the contemporary society. In this report, we measure brain waves when it is Iyasareru by Iyashi stimulation in this study and am intended that I evaluate Iyashi objectively by analyzing it. We used ESAM for electroencephalographic analysis. There was the parameter indicating the different change in time Iyasareru as a result of analysis and time when it was Iyasarenai. Therefore the possibility that we could evaluate Iyashi using an electroencephalographic measurement objectively was shown.