An arrangement comprising a defrosting apparatus and an evaporator, wherein the defrosting apparatus comprises: a heater case provided with a heat pipe seating part (271a1) extending from one surface thereof in a recessed shape and a heater receiving part extending to be parallel with the heat pipe seating part (271a1); a heater mounted in the heater receiving part (271a2) so as to emit heat when power is applied thereto; a heat pipe forming a flow path through which a working fluid filled therein flows, having a part seated on the heat pipe seating part, the heat pipe is disposed adjacent to a cooling pipe of the evaporator such that heat is radiated to the cooling pipe of the evaporator by the working fluid at a high temperature being heated by the heater; and a holder detachably coupled to the heater case so as to cover the heat pipe seated on the heat pipe seating part (271a1), wherein the heat pipe comprises: a main pipe (272e1) formed of a first material, repeatedly bent in a zigzag form to configure a plurality of steps or columns, and disposed adjacent to the cooling pipe; a first connection pipe (272e2) formed of a second material, and connected to one end portion of the main pipe (272e1) in a straight line by welding; a second connection pipe (272e3) formed of the second material, and connected to another end portion of the main pipe (272e1) in a straight line by welding; and a joint pipe (272e4) formed of the second material, and having a first connection portion (272e4a) connected to the first connection pipe (272e2), a second connection portion (272e4b) connected to the second connection pipe (272e3), and a working fluid injection portion (272e4c) in communication with the first and second connection portions (272e4a, 272e4b) and so that the working fluid is injectable into the communicated pipes (272e2, 272e3). a heater case provided with a heat pipe seating part (271a1) extending from one surface thereof in a recessed shape and a heater receiving part extending to be parallel with the heat pipe seating part (271a1); a heater mounted in the heater receiving part (271a2) so as to emit heat when power is applied thereto; a heat pipe forming a flow path through which a working fluid filled therein flows, having a part seated on the heat pipe seating part, the heat pipe is disposed adjacent to a cooling pipe of the evaporator such that heat is radiated to the cooling pipe of the evaporator by the working fluid at a high temperature being heated by the heater; and a holder detachably coupled to the heater case so as to cover the heat pipe seated on the heat pipe seating part (271a1), wherein the heat pipe comprises: a main pipe (272e1) formed of a first material, repeatedly bent in a zigzag form to configure a plurality of steps or columns, and disposed adjacent to the cooling pipe; a first connection pipe (272e2) formed of a second material, and connected to one end portion of the main pipe (272e1) in a straight line by welding; a second connection pipe (272e3) formed of the second material, and connected to another end portion of the main pipe (272e1) in a straight line by welding; and a joint pipe (272e4) formed of the second material, and having a first connection portion (272e4a) connected to the first connection pipe (272e2), a second connection portion (272e4b) connected to the second connection pipe (272e3), and a working fluid injection portion (272e4c) in communication with the first and second connection portions (272e4a, 272e4b) and so that the working fluid is injectable into the communicated pipes (272e2, 272e3). a main pipe (272e1) formed of a first material, repeatedly bent in a zigzag form to configure a plurality of steps or columns, and disposed adjacent to the cooling pipe; a first connection pipe (272e2) formed of a second material, and connected to one end portion of the main pipe (272e1) in a straight line by welding; a second connection pipe (272e3) formed of the second material, and connected to another end portion of the main pipe (272e1) in a straight line by welding; and a joint pipe (272e4) formed of the second material, and having a first connection portion (272e4a) connected to the first connection pipe (272e2), a second connection portion (272e4b) connected to the second connection pipe (272e3), and a working fluid injection portion (272e4c) in communication with the first and second connection portions (272e4a, 272e4b) and so that the working fluid is injectable into the communicated pipes (272e2, 272e3).