PROBLEM TO BE SOLVED: To provide a powder treatment agent which is safe with no generation of hydrogen, is suitably used in a surface treatment of powder, exhibits good compatibility with other raw materials of cosmetics, and therefore, improves a dispersing property and stability of powder contained in a cosmetic, and provides high water resistance, sebaceous resistance, glossiness, feeling, adhesiveness, and the like to the cosmetic, to provide a powder which has been subjected to a surface treatment with the powder treatment agent, and to provide a cosmetic raw material and a cosmetic which are produced by blending them, exhibit superior storage stability, have a superior outer appearance, and exhibit a superior sensation during use.SOLUTION: A sugar alcohol-modified organopolysiloxane having a specified structure is used in the powder treatment.COPYRIGHT: (C)2012,JPO&INPIT【課題】水素が発生せず安全であり、粉体の表面処理に好適に使用することができ、また、化粧料の他の原料との親和性がよく、したがって、粉体を含む化粧料中の当該粉体の分散性及び安定性を向上することができ、更に、化粧料に良好な耐水性、耐皮脂性、光沢、感触、付着性等を付与し得る粉体処理剤、並びに、該粉体処理剤で表面処理された粉体、更には、これらを配合してなる優れた保存安定性、外観及び使用感を備えた化粧料用原料及び化粧料を提供すること【解決手段】特定の化学構造を有する糖アルコール変性オルガノポリシロキサンを粉体処理に使用する。【選択図】なし