[object] To improve a light extraction efficiency of a whole of a luminescent device. [Solving means] A light-emitting device 3 comprises a transparent or semitransparent first electrode 46, a second electrode 52 that forms a pair with the first electrode 46 and reflects light, and organic semiconductor layers 47, 48, 49, 50, and 51, which comprise a photoelectric converting layer 49 that emits light by recombining holes removed from one of the first electrode 46 and the second electrode 52 with electrons removed from the other of the first electrode 46 and the second electrode 52, wherein the organic semiconductor layers 47, 48, 49, 50, and 51 comprise between the first electrode 46 and the photoelectric converting layer 49 a light extraction improving layer 99, which contains at least silver or gold in part as a component, partially reflects light, and has transparency.