A micro lens array includes: a glass substrate; and a plurality of resin lenses arranged on at least one main surface of the glass substrate, wherein, among the plurality of lenses, resin lenses arranged on one main surface of the glass substrate are such that a plurality of lines of lenses arranged in a first direction is arranged side by side in a second direction different from the first direction, a core thickness, a radius of curvature, and a surface shape of a resin lens in a certain lens line are different from a core thickness, a radius of curvature, and a surface shape of a resin lens of another lens line, and the resin lenses have the same resin volume.