Electronic device

An electronic device comprising:

• a metal housing having an installation space therein;
• a printed circuit board stacked on an inner surface of the metal housing and including a heat-generating element arranged on one surface of the printed circuit board;
• and
• a heat transfer coin provided such that one surface of the heat transfer coin comes into contact with a portion of the other surface of the printed circuit board, opposite to the heat-generating element, so as to dissipate heat generated from the heat-generating element, wherein the printed circuit board is formed with an element mounting hole through which the heat-generating element passes,
• wherein the heat transfer coin covers the element mounting hole, the one surface being in contact with a heat-generating surface of the heat-generating element, and
• wherein the heat transfer coin is formed with a heat-generating surface receiving groove for accommodating a part of an end including the heat-generating surface of the heat-generating element.