Cover glass and method of producing same

A method of producing a cover glass having a compressive stress layer formed at each of a front surface side and a rear surface side thereof, comprising the steps of:

• preparing a glass formation member including a central region and a curved-surface region provided consecutively to an outer edge of said central region and formed to be curved in a direction getting away from the front surface as said curved-surface region extends outwardly from said central region;
• preparing a storage bath having a chemical strengthening salt stored therein;
• and
• forming said compressive stress layer in said glass formation member at each of said front surface side and said rear surface side by immersing said glass formation member in said chemical strengthening salt,
• in the step of forming said compressive stress layer, chemical strengthening being performed such that said compressive stress layer in a region having the smallest approximated curvature radius R in a depressed-side region disposed at an inner side in the curve of said curved-surface region has a compressive stress layer depth with which a surface stress value thereof becomes higher than a surface stress value of said compressive stress layer formed in said central region and becomes a substantial peak.