A light emitting device comprising: a light emitting substrate provided with a plurality of light emitting elements; and a luminance equalizer sheet facing the light emitting substrate, having a plurality of through holes for transmitting light irradiated from the light emitting elements and having a linear expansion coefficient different from a linear expansion coefficient of the light emitting substrate, the light emitting substrate and the luminance equalizer sheet being positioned relative to each other at a predetermined position, at least one with a larger linear expansion coefficient among the light emitting substrate and the luminance equalizer sheet having a curved shape, a degree of curvature of the one with the larger linear expansion coefficient being larger than a degree of curvature of the one with a smaller linear expansion coefficient among the light emitting substrate and the luminance equalizer sheet; in a case where the light emitting substrate has a flat shape and the luminance equalizer sheet has a curved shape, the luminance equalizer sheet is curved such that an angle (θ1) between a plane of the light emitting substrate and a tangent plane of the luminance equalizer sheet in a perpendicular direction of the plane of the light emitting substrate increases as moving away from the predetermined position; in a case where the light emitting substrate has a curved shape and the luminance equalizer sheet has a flat shape, the light emitting substrate is curved such that an angle (θ1) between a tangent plane of the light emitting substrate and a plane of the luminance equalizer sheet in a perpendicular direction of the tangent plane of the light emitting substrate increases as moving away from the predetermined position; and in a case where the light emitting substrate has a curved shape and the luminance equalizer sheet has a curved shape, the light emitting substrate and the light emitting substrate are curved such that an angle (θ1) between a tangent plane (TPa) of the light emitting substrate and a tangent plane (TPb) of the luminance equalizer sheet in a perpendicular direction of the tangent plane of the light emitting substrate increases as moving away from the predetermined position. a light emitting substrate provided with a plurality of light emitting elements; and a luminance equalizer sheet facing the light emitting substrate, having a plurality of through holes for transmitting light irradiated from the light emitting elements and having a linear expansion coefficient different from a linear expansion coefficient of the light emitting substrate, the light emitting substrate and the luminance equalizer sheet being positioned relative to each other at a predetermined position, at least one with a larger linear expansion coefficient among the light emitting substrate and the luminance equalizer sheet having a curved shape, a degree of curvature of the one with the larger linear expansion coefficient being larger than a degree of curvature of the one with a smaller linear expansion coefficient among the light emitting substrate and the luminance equalizer sheet; in a case where the light emitting substrate has a flat shape and the luminance equalizer sheet has a curved shape, the luminance equalizer sheet is curved such that an angle (θ1) between a plane of the light emitting substrate and a tangent plane of the luminance equalizer sheet in a perpendicular direction of the plane of the light emitting substrate increases as moving away from the predetermined position; in a case where the light emitting substrate has a curved shape and the luminance equalizer sheet has a flat shape, the light emitting substrate is curved such that an angle (θ1) between a tangent plane of the light emitting substrate and a plane of the luminance equalizer sheet in a perpendicular direction of the tangent plane of the light emitting substrate increases as moving away from the predetermined position; and in a case where the light emitting substrate has a curved shape and the luminance equalizer sheet has a curved shape, the light emitting substrate and the light emitting substrate are curved such that an angle (θ1) between a tangent plane (TPa) of the light emitting substrate and a tangent plane (TPb) of the luminance equalizer sheet in a perpendicular direction of the tangent plane of the light emitting substrate increases as moving away from the predetermined position.