To provide an optical laminate body which displays stable luminance improvement effect for a long period, an optical element formed by laminating a polarizing plate on the optical laminate body, and an optical product equipped with the optical element.

The optical laminate body is formed by laminating a polarization selective layer on a wide-band 1/4-wavelength plate (C), which is a laminate of a 1/2-wavelength plate (A) and a 1/4-wavelength plate (B), one of which is made of a cycloaliphatic structure containing polymer resin. The present invention includes the optical element formed by laminating the optical laminate body and a polarizing plate and the optical product equipped with the optical element.