Aqueous hydrophilic coating composition capable of forming coating film having excellent self-cleaning ability against stains adhered thereon, and surface-treated material having formed thereon coating film having excellent self-cleaning ability against stains adhered thereon

A water-based hydrophilic coating composition obtained by adding to a liquid medium:

• an inorganic compound (A) having colloidal silica (a) modified with at least one or more of organoalkoxysilane compounds (b) having one or more groups selected from the group consisting of a glycidyl group, a vinyl group and an amino group;
• a water-soluble resin (B);
• and
• amorphous silica (C) represented by M2O·SiO2,
• wherein M represents an alkali metal and the mass ratio of M2O/SiO2 is from 0.05 to 0.3, and
• wherein a mass ratio (a/b) of the component (a) to the component (b) in the inorganic compound (A) is from 0.25 to 4.