PROBLEM TO BE SOLVED: To provide antiallergic agents, intestinal immunoenhancers, and intestinal adhesiveness improvers of lactic acid bacteria, which are safely ingestible, are inexpensively available, and are excellent in the intestinal adhesiveness improving action of lactic acid bacteria.SOLUTION: The agent of the present invention contains stems and/or leaves of plants which are green juice materials. The plants which are green juice materials preferably comprise one or more selected from (1) Hordeum vulgare, (2) Ipomoea batatas, (3) Brassica oleracea, (4) Morus, and (5) Peucedanum japonicum, more preferably comprise two or more of the (1) to (5), and further more preferably comprise the (1) and one or more selected from (2) to (5).SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】安全に摂取でき、安価に入手でき、且つ乳酸菌の腸管接着性向上作用に優れた抗アレルギー剤、腸管免疫増強剤及び乳酸菌の腸管接着性向上剤を提供すること。【解決手段】本発明の剤は青汁素材である植物の茎及び/又は葉を含有する。青汁素材である植物は、(1)大麦、(2)甘藷、(3)ケール、(4)桑及び(5)ボタンボウフウから選ばれる1種以上を含むことが好ましく、該(1)~(5)のうち2種以上を含むことが更に好ましく、該(1)と(2)~(5)から選ばれる1種以上とを含むことが更に一層好ましい。【選択図】図1