A refrigerator includes a cabinet, a refrigerant pipe extending in a vertical direction, a plurality of heat-exchange fins through which the refrigerant pipe passes, a pair of frames supporting both sides of the refrigerant pipe, an auxiliary defrost heater provided at an upper portion of the refrigerant pipe and configured to heat an upper region of the refrigerant pipe during a defrosting operation, a defrost heater disposed below a lower end of the refrigerant pipe and configured to heat the refrigerant pipe and air outside the refrigerant pipe during the defrosting operation, and a defrost heater cover disposed between the defrost heater and the lower end of the refrigerant pipe and covering an upper portion of the defrost heater. The defrost heater cover defines a plurality of air holes that allow air heated by the defrost heater to flow upward to the refrigerant pipe.