Press molding glass material, manufacturing method thereof, and manufacturing method of optical element

A press molding glass material, comprising:

• a core portion composed of optical glass;
• and
• a surface layer covering the core portion,
• wherein the surface layer comprises an outermost layer which contacts a molding surface of a molding die in press molding, and an intermediate layer adjacent to the outermost layer,
• wherein the outermost layer is a silicon oxide film having a surface free energy measured by a three-solution method of equal to or less than 75 mJ/m2 and having a film thickness of less than 15 nm,
• wherein in the silicon oxide, oxide is excessive with respect to a stoichiometric composition of silicon oxide, and
• wherein the intermediate layer is a film composed of a film material having a bond-radius difference from a silicon oxide based on a stoichiometric composition of more than 0.10 Å, wherein, in a case in which the bond-radius difference is more than 0.10 Å and equal to or less than 0.40 Å, a film thickness of the intermediate layer is equal to or less than 5 nm.