An oil-in-water emulsion cosmetic containing (A) to (E) as essential components and having a pH of 6 or less:(A) an L-ascorbyl tetra fatty acid ester derivative represented by the following general formula (I)wherein R represents a branched alkyl fatty acid residue having 8 to 18 carbons；(B) a polar oil which is liquid at 25°C and having an IOB value of 0.1 to 0.5； (C) a chelating agent； (D) an antioxidant； and (E) water.
