The general conception of morbid leukorrhea is confused in its clinical application. Therefore, this studt was conducted to examine this conception based on terminology of morbid leukorrhea centering around historical literatures. The result of this study is summarized as follows. 1. Morbid leukorrhea had been considered as a disease of all women before Shou period, and then it was subdivided. 2. It was shown that morbid leukorrhea, spontaneous emission, whitish and turbid urine, and dysentery were treated by the same mwthod because their exposed regions and conditions were very similar. For this reason, it was confused to define terminology of morbid leukorrhea. 3. It was also shown that there existed both terminologies of morbid leukoeehea, as its conception in a board sense, even in Sikryoboncho. After that, however, only terminology of morbid leukorrhea was used. Currently, these terminologies tended to be used together. 4. In case of its conception in a board sense, morbid leukorrhea means all gynecological disease and syndrome of the lower burner which cause diseases in the belt channel 5. In case of its conceptio of a narrow sense, morbid leukorrhea implies disease in the front middle regions of channels and collacterals, which has been recntly considered as secretions of women.