A light guide plate made of a transparent resin includes a first main surface and a second main surface opposite to the first main surface. The first main surface has a surface portion provided with convex portions having a height in the range of 510^-7 m to 610^-5 m each and a pitch in the range of 510^-7 m to 410^-4 m. The light guide plate having tip portions of at least 80% of the total convex portions with a radius of curvature of 210^-6 m or less, or the surface of the convex portions having a surface roughness of 310^-7 m or less.