A heat conversion device comprising: an element; a heat sink disposed on the element; a fan disposed to be spaced a predetermined distance from the heat sink; and a plurality of coupling members which are integrally formed from a silicone resin and which have an elastic modulus ranging from 1*10 3 kgf/cm 2 to 30*10 3 kgf/cm 2 and fix the heat sink and the fan, wherein each of the coupling members includes a shaft, a first fixing portion disposed on one end of the shaft and fixed to the heat sink, a second fixing portion which protrudes from an outer circumferential surface of the shaft and is fixed to the fan, and a separating portion which is disposed between the first fixing portion and the second fixing portion, wherein the separating portion is disposed between the heat sink and the fan, and wherein the shaft, the first fixing portion, the second fixing portion, and the separating portion are integrally formed, wherein the fan includes a hole through which the shaft passes, wherein a first surface of the separating portion is in contact with a first periphery of the hole, wherein a first surface of the second fixing portion is in contact with a second periphery of the hole, wherein a width of each of the first surface of the separating portion and the first surface of the second fixing portion is greater than a diameter of the hole, and wherein a distance between the first surface of the separating portion and the first surface of the second fixing portion ranges from 0.9 to 1 times a height of the fan, wherein a groove for fixing the first fixing portion is formed in the heat sink, characterized in that the element is a thermoelectric element, and the first fixing portion includes a front end region having a first diameter, a middle region having a second diameter, and a rear end region having a third diameter larger than the second diameter, the first diameter of the front end region is less than a diameter of the groove, the second diameter of the middle region is 1 to 1.1 times the diameter of the groove, and the third diameter of the rear end region is larger than the diameter of the groove. an element; a heat sink disposed on the element; a fan disposed to be spaced a predetermined distance from the heat sink; and a plurality of coupling members which are integrally formed from a silicone resin and which have an elastic modulus ranging from 1*10 3 kgf/cm 2 to 30*10 3 kgf/cm 2 and fix the heat sink and the fan, wherein each of the coupling members includes a shaft, a first fixing portion disposed on one end of the shaft and fixed to the heat sink, a second fixing portion which protrudes from an outer circumferential surface of the shaft and is fixed to the fan, and a separating portion which is disposed between the first fixing portion and the second fixing portion, wherein the separating portion is disposed between the heat sink and the fan, and wherein the shaft, the first fixing portion, the second fixing portion, and the separating portion are integrally formed, wherein the fan includes a hole through which the shaft passes, wherein a first surface of the separating portion is in contact with a first periphery of the hole, wherein a first surface of the second fixing portion is in contact with a second periphery of the hole, wherein a width of each of the first surface of the separating portion and the first surface of the second fixing portion is greater than a diameter of the hole, and wherein a distance between the first surface of the separating portion and the first surface of the second fixing portion ranges from 0.9 to 1 times a height of the fan, wherein a groove for fixing the first fixing portion is formed in the heat sink, characterized in that the element is a thermoelectric element, and the first fixing portion includes a front end region having a first diameter, a middle region having a second diameter, and a rear end region having a third diameter larger than the second diameter, the first diameter of the front end region is less than a diameter of the groove, the second diameter of the middle region is 1 to 1.1 times the diameter of the groove, and the third diameter of the rear end region is larger than the diameter of the groove.