To provide a surface-treated powder that has a good feeling in use and effectviely inhibits unnatural whiteness, and also has excellent dispersibility in the formula, and cosmetics containing the surface-treated powder.SOLUTION: The present invention provides a surface-treated powder coated with an oligomer ester synthesized from following components (A) and (B): (A) at least one selected from C6-22 bivalent carboxylic acids containing linear, branched, or cyclic structures, and (B) a polyglycerol with an average degree of polymerization of 2-15, calculated in terms of hydroxyl values.SELECTED DRAWING: None【課題】優れた使用感と白浮き抑制効果を有し、処方中での分散性にも優れる表面処理粉体、及び、該表面処理粉体を含有する化粧料を提供する。【解決手段】以下の成分(A)及び(B)より合成されてなるオリゴマーエステルで被覆された表面処理粉体を用いる。(A)炭素数6~22の直鎖、分岐鎖、若しくは環状構造を含む二価カルボン酸から選択される1種又は2種以上(B)水酸基価から算出した平均重合度が2~15のポリグリセリン【選択図】なし
