A planar light source, light-emitting elements are divided into groups on the basis of their chromaticity. Light-emitting elements are selected from two chromaticity groups which being substantially equally away from a target chromaticity in directions reverse to each other and the two light-emitting elements are alternately provided in a longitudinal direction and in a transverse direction, respectively. Further, configuring two light-emitting elements into light-emitting elements pair so that distances d2 at which two of the light-emitting elements in each of the pairs are provided are less than distances d1 at which the pairs are provided. A display device of using the planar light source.