PROBLEM TO BE SOLVED: To provide a cosmetic that is excellent in ultraviolet protection effect and shows high moisture-retaining property.SOLUTION: The O/W emulsion cosmetic includes (A) a plate-like powder with a surface treated with alkylalkoxysilane, (B) an oil that is in a solid state at 25°C, (C) an oil that is in a liquid state at 25°C, which is chosen from a hydrocarbon oil, an ester oil and an ether oil, (D) a nonionic surfactant with an HLB of &le8, (E) a water-soluble polymer having an 8-30C hydrocarbon group and an anionic group within the molecule and (F) water, provided that the mass ratio of component (B) to (A) {(B)/(A)} is 0.01-5.COPYRIGHT: (C)2011,JPO&INPIT【課題】紫外線防御効果に優れ、保湿性の高い化粧料を提供する。【解決手段】次の成分(A)、(B)、(C)、(D)、(E)及び(F):(A)アルキルアルコキシシランで表面処理された板状粉体、(B)25℃で固体の油、(C)炭化水素油、エステル油及びエーテル油から選ばれる25℃で液体の油、(D)HLB8以下の非イオン界面活性剤、(E)分子内に炭素数8~30の炭化水素基と、アニオン性基とを有する水溶性高分子、(F)水を含有し、成分(A)及び(B)の質量割合が、(B)/(A)=0.01~5であるO/W型乳化化粧料。【選択図】なし