To provide a radiator, capable of radiating heat fast with a simple structure, saving electricity, without using a power source and increasing a radiation speed and area by the ethanol provided in an airtight container, a heat-conducting net or the various shape designs outside the airtight container.

This radiator is characterized by the airtight container of ethanol which absorbs heat, provided at one end of a heat pipe and the outer shape of the airtight container designed into various shapes increasing an area. Moreover, it is characterized by a heat-conducting net formed of at least one piece of heat-conducting material provided inside the airtight container.