Chemically strengthened glass

A glass sheet, having a compressive stress layer formed in a surface layer of the glass sheet according to an ion exchange method,

• wherein the glass sheet has a surface roughness (Ra) of 0.20 nm or higher,
• two or more scratches each having a length of 5 μm or more and a width of 0.1 μm or more are not present in a region of 10 μm×5 μm of the surface of the glass sheet,
• an average hydrogen concentration, at a depth from the surface of the glass sheet of from 0.1 μm to 0.4 μm, is in a range from 0.070 to 0.150 mol/L, and
• a hydrogen concentration Y in a region to a depth X from a surface of the glass sheet satisfies relational equation (I) at X=from 0.1 to 0.4 (μm):
• Y=aX+b (I)
• wherein:
• Y is the hydrogen concentration measured as H2O (mol/L);
• X is the depth from the surface of the glass sheet (μm);
• a is in a range from −0.210 to −0.050;
• and
• b is in a range from 0.020 to 0.220.