Provided is a glass substrate suitable particularly as a cover glass or the like for a mobile display device, the glass substrate having high scratch resistance and smoothness, good visibility, and low reflectance. A glass substrate having, between a fluorine coating layer on a front surface side and a DLC layer on a substrate side, an intermediate layer containing a polysiloxane obtained by polycondensation of an alkoxy silane including an alkoxy silane represented by formula (1) and, as needed, an alkoxy silane represented by formula (2). (1): R1[Si(OR2)3]P (In formula (1), R1 represents a C1-12 hydrocarbon group substituted by a ureido group, R2 represents a C1-5 alkyl group, and p represents an integer of 1 or 2.) (2): (R3)nSi(OR4)4-n (In formula (2), R3 represents a hydrogen atom or aC1-8 hydrocarbon group which may be substituted by a hetero atom, a halogen atom, a vinyl group, an amino group, a glycidoxy group, a mercapto group, a methacryloxy group, an isocyanate group, or anacryloxy group, R4 represents a C1-5 alkyl group, and n represents an integer of 0-3.).