For providing a chip-type light emitting device, having a plural number of light emitting elements therein, so as to enable to obtain a high optical output with preferable conversion efficiency thereof, and a wiring substrate for that, the chip-type light emitting device, mounting the plural number of the light emitting diodes 30, 30 . . . within an inside of an insulating substrate, has a base substrate 10 and a reflector substrate 20, which is laminated and adhered on an upper surface thereof. In the base substrate 10 is formed a though hole 11, on the reverse surface of which is formed a heat radiating plate 12 made from a thick metal thin film. Also, on an inner periphery and a bottom portion of the through hole are formed a reflection film 13, and further wiring patterns 14, 14 . . . are formed on the substrate. On the other hand, the reflector substrate 20 is formed with a through hole 21, having a diameter larger than that of the through hole of the base substrate, and on an inner peripheral surface thereof is formed a reflection film 22. This reflector substrate is disposed and adhered on an upper surface of the base substrate, at such the position that portions of the wiring patterns are exposed through the through hole thereof, and the plural number of the light emitting diodes are connected to the wiring patterns on the base substrate, to be mounted thereon.