And a member having the glass composition of the composition on a substrate

The present invention provides a high refractive index and low-temperature softening property, and the average coefficient of thermal expansion of the glass composition, and a member of the composition on the substrate. The glass composition of the present invention, wherein a refractive index (nd) of 1.88 or more and 2.20 or less, a glass transition temperature (Tg) less than 450 deg.] C and not more than 490 ℃, and the average thermal expansion coefficient of 50 ~ 300 ℃ of (α50 -300) not less than 60 × 10-7 / K and 90 × 10-7 / K or less, and the content of Bi2O3 mol% based on oxides represented 5 to 25%.