Optical element-use resin composition, optical element, and projection screen

The present invention provides even pressure is applied to a surface of the optical lens element, the lens shape is not squeezed flat, further, even if the case can be squeezed flat once restored, to ensure good quality (i.e., high abrasion resistance) of the optical element The resin composition, an optical element, and a projection screen. The optical element according to the present invention, the resin composition, resin composition for an optical element, a glass transition temperature which is 5-36 deg.] C, equilibrium modulus of elasticity is 0.859 × 108-3.06 × 108dyne / cm2.