An oil-in-water emulsified skin cosmetic comprising the following ingredients through: Acetylated hyaluronic acid represented by the following structural formula: wherein R denotes H or COCH 3, n is a real number representing the degree of polymerization, wherein the acetylated hyaluronic acid has 2.6-3.8 of the four alcoholic hydroxy groups in the repeating unit of acetylated hyaluronic acid represented by formula replaced by acetyl groups and the limiting viscosity is 50-200 cm 3 /g, wherein the blend ratio of the ingredient is 0.001-0.1 wt% A polymethacryloyloxyethyl phosphorylcholine derivative having the following structural formula: wherein x and y are real numbers representing the degrees of polymerization of corresponding structural units: x/y = 2/8 to 8/2, wherein the blend ratio of said ingredient is 0.003-0.3 wt% One, two or more types of non-emulsifying cross-linked silicone, wherein the blend ratio of ingredient © is 0.5-5.0 wt%, Glycerin, wherein the blend ratio of ingredient is 5.0-10.0 wt%, Polyvinyl alcohol, wherein the blend ratio of ingredient is 0.1-1.0 wt%, Acrylamide-type thickener, wherein the acrylamide-type thickener is vinylpyrrolidone/2-acrylamide-2-methylpropane sulfonic acid copolymer and/or sodium N,N'-dimethylacrylamide-2-acrylamide-2-methylpropane sulfonate/N, N'-methylenebisacrylamide copolymer, wherein the blend ratio of ingredient is 0.1-1.0 wt%, Oil component in the total amount of 25-40 wt% relative to the total amount of the oil-in-water emulsified skin cosmetic. Acetylated hyaluronic acid represented by the following structural formula: wherein R denotes H or COCH 3, n is a real number representing the degree of polymerization, wherein the acetylated hyaluronic acid has 2.6-3.8 of the four alcoholic hydroxy groups in the repeating unit of acetylated hyaluronic acid represented by formula replaced by acetyl groups and the limiting viscosity is 50-200 cm 3 /g, wherein the blend ratio of the ingredient is 0.001-0.1 wt% wherein R denotes H or COCH 3, n is a real number representing the degree of polymerization, wherein the acetylated hyaluronic acid has 2.6-3.8 of the four alcoholic hydroxy groups in the repeating unit of acetylated hyaluronic acid represented by formula replaced by acetyl groups and the limiting viscosity is 50-200 cm 3 /g, wherein the blend ratio of the ingredient is 0.001-0.1 wt% A polymethacryloyloxyethyl phosphorylcholine derivative having the following structural formula: wherein x and y are real numbers representing the degrees of polymerization of corresponding structural units: x/y = 2/8 to 8/2, wherein the blend ratio of said ingredient is 0.003-0.3 wt% wherein x and y are real numbers representing the degrees of polymerization of corresponding structural units: x/y = 2/8 to 8/2, wherein the blend ratio of said ingredient is 0.003-0.3 wt% One, two or more types of non-emulsifying cross-linked silicone, wherein the blend ratio of ingredient © is 0.5-5.0 wt%, Glycerin, wherein the blend ratio of ingredient is 5.0-10.0 wt%, Polyvinyl alcohol, wherein the blend ratio of ingredient is 0.1-1.0 wt%, Acrylamide-type thickener, wherein the acrylamide-type thickener is vinylpyrrolidone/2-acrylamide-2-methylpropane sulfonic acid copolymer and/or sodium N,N'-dimethylacrylamide-2-acrylamide-2-methylpropane sulfonate/N, N'-methylenebisacrylamide copolymer, wherein the blend ratio of ingredient is 0.1-1.0 wt%, Oil component in the total amount of 25-40 wt% relative to the total amount of the oil-in-water emulsified skin cosmetic.