The utility model provides a light diffusion component and a display device, wherein the light diffusion component comprises a substrate having light transmissivity, a plurality of light diffusion parts formed on one surface of the substrate, and a light shading layer formed on the surface of the substrate in a region different from the region of the light diffusion parts, as well as a light scattering body; the light diffusion parts have light emergent end faces on the side of the substrate, and light incident end faces larger than the light emergent end faces in area on the side opposite to the side of the substrate; the height of each light diffusion part from the light incident end face to the light emergent end face is greater than the thickness of the light shading layer; and the light scattering body is arranged more closely to the light emergent side than the light diffusion parts.