Being the method of producing the bunashimeji origin extract from the bunashimeji basidiocarp or the mecelia, it uses the alkaline water solvent as a extractant, the food and the medicine which contain the bunashimeji origin extract, and the said extract which are obtained by the production method and the said production method of the bunashimeji origin extract.ブナシメジ子実体又は菌糸体よりブナシメジ由来抽出物を製造する方法であって、抽出溶媒としてアルカリ性の水性溶媒を用いる、ブナシメジ由来抽出物の製造方法、該製造方法により得られるブナシメジ由来抽出物、ならびに該抽出物を含有する食品及び医薬。