《源氏物語》「澪標」篇，「明石姬君」誕生的描寫中，出現了一位重要的人物―「宣旨之娘」。「宣旨之娘」被光源氏欽點為「明石姬君」的乳母。而此人將以乳母身分出發前往明石照顧光源氏生涯中唯一之女「明石姬君」。本論文以此女性之母親「宣旨」一官職來探討為何《源氏物語》的作者要將唯一的女兒託付給一個在宮廷中當任過「宣旨」一職女性的女兒，藉由考察平安時代中真實存在過的「宣旨」一官職的人物像，進而分析史實與物語虛構內容的相同與相異處。最後探討歷史中「宣旨」與「弁官」人物如何帶給虛構物語《源氏物語》人物腳色描述的深層影響。

In the famous Japanese court tale, Genji-Monogatari (The Tale of Genji), there has a unipue description about the characters which contributes much to its historic representation of medieval life. The role of ＂Senji-no-musume＂ in Genji-Monogatari is very important, but in this article, I will consider the role of ＂Senji-no-musume＂ 'mother, a woman her daughter was a nursing mother of ＂Akashi-no-himegimi＂ in the story. Referring to the historical meaning of ＂Senji＂, here I will look into the mystery of the lady called ＂Senji＂.