PROBLEM TO BE SOLVED: To provide a technique for producing an edible chicken egg having an antioxidant power sufficiently containing ergothioneine by using bioconcentration of ergothioneine to the egg. [MEANS FOR SOLVING PROBLEMS] An ergothioneine-containing chicken egg according to the present invention is produced by producing an ergothioneine-containing extract from a waste medium used in the production of edible straw, and mixing the extract with a commonly used chicken feed for egg collection. It is obtained from chickens produced by producing feed for chickens and feeding the feed to eggs for egg collection for a predetermined period. [Selection] Figure 1【課題】 エルゴチオネインの鶏卵への生物濃縮を用いてエルゴチオネインを十分に含有した抗酸化力を有する食用鶏卵の生産技術を提供する。【解決手段】 本発明に係るエルゴチオネイン含有鶏卵は、食用茸の生産に用いられた廃培地からエルゴチオネイン含有抽出液を製造し、当該抽出液を一般に使用される鶏用飼料に所定量混合して採卵用鶏の飼料を製造して当該飼料を所定期間採卵用鶏に給餌して飼育した鶏から得られる。【選択図】 図１
