To provide a decorative sheet which has water resistance, and is free from deterioration of a plastic mother material or a base material and suitable for obtaining a plastic molded object with surface hydrophilicity, and also to provide the plastic molded object using this sheet.

In this decorative sheet, on its surface material, a base layer formed of an acrylic polyol resin having an alkoxysilyl group as a coating material, and a surface layer formed with a coating material for a surface layer including a chemical compounds represented by a formula : (R1)n-Si-(OR 2)4-n (in the formula, R1 is a 1-6C an alkyl group, an epoxy alkyl group, an aryl group, or an alkenyl group; R2 is a 1-6C alkyl group; n is 0-2) and at least one or more kind inorganic oxides as a surface coating material, are set up.