The present invention relates to a glass substrate which is characterized in that it has a primer layer that is formed thereon and includes a hydrolysis product of a hydrolysable silicon compound having an alkylene group and a hydrolysis product of a hydrolysable zirconium compound or hydrolysable titanium compound, and that, in the primer layer, zirconium is in an amount by weight ratio of 0.0002 times to 0.0025 times that of silicon, or titanium is in an amount by weight ratio of 0.0005 times to 0.0045 times that of silicon. Furthermore, the present invention relates to an anti-fogging article having a resin film that exhibits water-absorptive property and/or hydrophilic property and is formed on the primer layer of the glass substrate.