According to the present invention, there is provided a silicon oxide-coated zinc oxide in which elution of zinc ions is suppressed, a method for producing the same, a silicon oxide-coated zinc oxide-containing composition, and a cosmetic, even if the silica film is formed of an alkali metal silicate salt. Provided. The silicon oxide-coated zinc oxide of the present invention is a silicon oxide-coated zinc oxide formed by coating the surface of zinc oxide particles with a silicon oxide film, and the average primary particle diameter of the zinc oxide particles is more than 50 nm and not more than 500 nm. In addition, the elution rate S of zinc oxide defined by the following formula (1) when held in a buffer solution of pH = 5 for 1 hour is 50% or less. Elution rate S = (Amount of eluted zinc oxide) / (Amount of zinc oxide in silicon oxide-coated zinc oxide) (1)本発明により、ケイ酸アルカリ金属塩で形成されたシリカ被膜であっても、亜鉛イオンの溶出が抑制された酸化ケイ素被覆酸化亜鉛とその製造方法および酸化ケイ素被覆酸化亜鉛含有組成物並びに化粧料が提供される。本発明の酸化ケイ素被覆酸化亜鉛は、酸化亜鉛粒子の表面を酸化ケイ素被膜により被覆してなる酸化ケイ素被覆酸化亜鉛であって、前記酸化亜鉛粒子の平均一次粒子径は５０ｎｍを超えかつ５００ｎｍ以下であり、かつ、ｐＨ＝５の緩衝液に１時間保持した際における、下記式（１）で定義される酸化亜鉛の溶出率Ｓが５０％以下である。溶出率Ｓ＝（溶出した酸化亜鉛量）／（酸化ケイ素被覆酸化亜鉛中の酸化亜鉛量）・・・（１）
