The present invention is chemically strengthened glass having, at the glass surface, a compression stress layer that has been subjected to ion exchange, wherein the chemically strengthened glass has a low-density layer resulting from the surface of the compression stress layer having a lowered density, the thickness of the low-density layer is 5-200 nm inclusive, and the ratio (D1/D3) of the density (D1) of the low-density layer and the density (D3) of an intermediate layer sandwiched between compressive stress layers and extending at the glass center section is at least 0.5 and less than 0.93.