PROBLEM TO BE SOLVED: To provide drinks, foods, and antiallergic agents containing a novel strain and its fungus body having an antiallergic action by suppression of the activity of a mast cell, production suppression of histamine, suppression of vascular hyperpermeability, and improvement of Th1/Th2 balance.SOLUTION: The invention provides a novel lactic acid bacteria strain belonging to Lactobacillus plantarum derived from Mongolian dairy products, and drinks and foods containing the strain and antiallergic agents containing this as an active ingredient.COPYRIGHT: (C)2015,JPO&INPIT【課題】マスト細胞の活性の抑制、ヒスタミンの産生抑制、血管透過性増大の抑制さらに、Th1/Th2バランスの改善により抗アレルギー作用を有する新規菌株並びにその菌体を含有する飲料、食品及び抗アレルギー剤を提供する。【解決手段】モンゴルの乳製品由来のラクトバチルス・プランタラム(Lactobacillus plantarum)に属する新規乳酸菌株、及びこの菌株を含有する飲料、食品、有効成分として含有する抗アレルギー剤。【選択図】図1