In 1920s, according as some modern transformations become imposed on families, interests on children become high. These interests bring a change, which may be called the discovery of children. In other words, children cease to be immature adults and become regarded as independent personalities. By the way, many discourses on children contain discourses concerning the nature and role of mothers. For, in order to raise children different from the fanner children, mother's way of raising them and her own ability are very important. It is not going too far to say that the birth of modern children accompanies with modern mothers. Therefore, discourse on children and discourse on mothers intertwine with each other and go hand in hand First of all, this study starts with the clue that mother is frequently mentioned in children's literary works. Those mentions of mother, for the most part, are about separations or partings between children and their own mothers, and therefore longings for mother frequently become a subject matter for children's literary works. But, what is foregrounded in those literary works for children is the emotions of their poetic speakers, not of mother. To put it in other words, it is the emotions and vision of the poetic speaker that are visualized in literary works concerning mothers. As a result, in these works, the configurations of mothers are deprived of reality and are dealt with in the extreme abstract. Mothers' nature is foregrounded and heightened in some literary works, whose animal characters and plant characters are both personalized. In those works, motherhood becomes worshipped and idealized. But, all these things only result in discourses that deprive mothers of their real foundations and idealized motherhood merely on the instinctual level. Moreover, at this very point, gender intervenes in those narratives. It is a "boy" who narrates. This boy is also a man who will form a new family and make himself the head of his family. In short, gender (difference) intervenes in the speaker's voice, which produces an idealized mother image separated from a real mother in the real world. At the same moment when children are discovered in 1920s, discourses concerning the role of mothers and motherhood appear on the stage and discussed. But this discussed mother is nowhere. She does not exist in the real world, but paradoxically she should also exist. She is an idealized object and is too far away. If children may be a landscape discovered with the eyes of a adult having the inner mind, their mothers may be a landscape captured by children. In the middle of these processes of discourse, the discourse concerning mothers seems to be in the turning point. It seems that in 1920s, mothers played a very large part in our multiple ordinary lives. Nevertheless, those features failed to come to the surface. Rather, many discourses erasing the foundations of motherhood shown in the real lives. The following problem needs more considerations: What does this gap tell? What shape does this gap assume in other texts.