Abstract: A press molding glass material including: a core portion composed of optical glass; and a surface layer covering the core portion, wherein the surface layer includes an outermost layer contacting with a molding surface of a molding die in press molding and an intermediate layer adjacent to the outermost layer, 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, and 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 ?, wherein, in a case in which the bond-radius difference is more than 0.10 ? and equal to or less than 0.40 ?, a film thickness of the intermediate layer is equal to or less than 5 nm.

Abstract: A press molding glass material including: a core portion composed of optical glass; and a surface layer covering the core portion, wherein the surface layer includes an outermost layer contacting with a molding surface of a molding die in press molding and an intermediate layer adjacent to the outermost layer, 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, and 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 ?, wherein, in a case in which the bond-radius difference is more than 0.10 ? and equal to or less than 0.40 ?, a film thickness of the intermediate layer is equal to or less than 5 nm.