Problem to be solved: to form a powder form having sufficient water dispersibility and dispersion stability when it is highly soluble in the biologically active substances extracted from the plant and added to the beverage.Solution: a plant extract (a) containing a water-soluble component, an enzyme (b), an HLB containing a surfactant (c) having a volume of 13 or more, and an enzyme (b) content of a plant extract (a) having a content of 0.5 to 120 (weight ratio) and HLB for a vegetable extract (a) is A water soluble powder containing a plant extract having a surfactant (c) content in the range of 0.1 to 15 (weight ratio).As the enzyme treatment product (b), enzymatic treatment rutin, enzyme treated Stevia or enzyme treated hesperidine is preferred.No selection【課題】植物より抽出された難水溶性の生理活性物質を高含有で、かつ飲料へ添加する際には十分な水分散性と分散安定性を持つ粉末形態にすること。【解決手段】難水溶性成分を含有する植物抽出物(A)、酵素処理物(B)、HLBが13以上の界面活性剤(C)を含有し、植物抽出物(A)に対する酵素処理物(B)の含有量が0.5~120(重量比)、植物抽出物(A)に対するHLBが13以上の界面活性剤(C)の含有量が0.1~15(重量比)である植物抽出物含有水溶化粉末。酵素処理物(B)としては、酵素処理ルチン、酵素処理ステビア、又は酵素処理ヘスペリジンが好ましい。【選択図】なし