Provided is a water-in-oil emulsion sunscreen cosmetic having a property not present in the prior art, of improved UV protection due to contact with water and/or sweat compared to directly after application, and which is also pleasant to use and easy to wash off. This water-in-oil emulsion sunscreen cosmetic contains: 6-40 mass % of a UV protector (A), an organic modified clay mineral (B), and an oil phase thickening agent (C) other than (B), and a silicone-based surfactant (D) having an HLB value of less than 8, wherein the ratio [total quantity of component (B) and component (C)]/[total quantity of non-volatile liquid oil components other than silicone oil (E)] is at least 0.04 but less than 0.68.本發明之目的在於提供一種油中水型乳化防曬化妝料,其具有藉由與水或汗等之接觸而紫外線防禦效果較剛塗佈後更為提高之先前未有之特性,且使用感及清洗性亦優異。本發明提供一種油中水型乳化防曬化妝料,其特徵在於:其含有(A)6~40質量%之紫外線防禦劑、(B)有機改性黏土礦物、(C)上述(B)以外之油相增黏劑、及(D)HLB未達8之聚矽氧系界面活性劑,且[(B)成分與(C)成分之合計量]/[(E)聚矽氧油以外之不揮發性液狀油分之合計量]之比率為0.04以上且未達0.68。
