To restrict increase in the temperatures of a light emitting element after it is lit by a method, wherein the light emitting element and a light emitting element substrate are housed in a main body case, and a heat insulating fin is integrally provided with the light emitting element substrate.

An LED lamp 10 or an LED lamp substrate 20 is housed in a main body case 30, and a part or all made of a material of superior conducivity such as a metal material, and a part of satisfactory thermal conductivity of this main body case 30 is connected to the LED lamp substrate 20, so as to be capable of direct thermal transfer. A heat insulating fin 21 is provided integrally with the LED lamp substrate 20, and after the heat of the LED lamp 10 is transmitted from an LED lead part 11 to the LED lamp substrate 20, heat is radiated from the wide surface area by a heat insulating fin 21. Thus, increase in the temperature of the LED lamp 10 after being lit can be restrained.