A defrosting device , comprising: a heating unit provided in an evaporator ; and a heat pipe , both end portions of which are connected to an inlet (171d', 171d") and an outlet (171c', 171c") of the heating unit , respectively, and at least part of the heat pipe is disposed adjacent to a cooling tube to dissipate heat to the cooling tube of the evaporator due to high-temperature working fluid (F) heated and transferred by the heating unit , wherein the heating unit comprises: a heater case provided with a vacant space therein, and provided with the inlet and the outlet at positions separated from each other, respectively, along a length direction; and a heater attached to an outer surface of the heater case to heat working fluid (F) within the heater case , characterized in that the heater comprises: a base plate formed of a ceramic material, and attached to the outer surface of the heater case ; a hot wire (171b2) formed on the base plate , and configured to dissipate heat during the application of power; and a terminal (171b3) provided on the base plate (171b1) to electrically connect the hot wire (171b2) to the power. a heating unit provided in an evaporator ; and a heat pipe , both end portions of which are connected to an inlet (171d', 171d") and an outlet (171c', 171c") of the heating unit , respectively, and at least part of the heat pipe is disposed adjacent to a cooling tube to dissipate heat to the cooling tube of the evaporator due to high-temperature working fluid (F) heated and transferred by the heating unit , wherein the heating unit comprises: a heater case provided with a vacant space therein, and provided with the inlet and the outlet at positions separated from each other, respectively, along a length direction; and a heater attached to an outer surface of the heater case to heat working fluid (F) within the heater case , characterized in that the heater comprises: a base plate formed of a ceramic material, and attached to the outer surface of the heater case ; a hot wire (171b2) formed on the base plate , and configured to dissipate heat during the application of power; and a terminal (171b3) provided on the base plate (171b1) to electrically connect the hot wire (171b2) to the power. a heater case provided with a vacant space therein, and provided with the inlet and the outlet at positions separated from each other, respectively, along a length direction; and a heater attached to an outer surface of the heater case to heat working fluid (F) within the heater case , characterized in that the heater comprises: a base plate formed of a ceramic material, and attached to the outer surface of the heater case ; a hot wire (171b2) formed on the base plate , and configured to dissipate heat during the application of power; and a terminal (171b3) provided on the base plate (171b1) to electrically connect the hot wire (171b2) to the power. a base plate formed of a ceramic material, and attached to the outer surface of the heater case ; a hot wire (171b2) formed on the base plate , and configured to dissipate heat during the application of power; and a terminal (171b3) provided on the base plate (171b1) to electrically connect the hot wire (171b2) to the power. <EOS>