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.).