A refrigerator comprising: a main body including a wall (12, 13, 14, 15, 16, 17) having an inner box, an outer box, and an insulation provided between the inner box and the outer box; an upper refrigerator compartment and a lower freezer compartment formed by the wall (12, 13, 14, 15, 16, 17); a door (30, 31) rotatably coupled to the main body configured to open and close the refrigerator compartment, and including an ice-making chamber formed in a front surface of the door (30, 31) to be separated and insulated from the refrigerator compartment; a refrigerator compartment cooler configured to generate cooling air to be supplied to the upper refrigerator compartment and disposed behind the upper refrigerator compartment; a freezer compartment cooler to generate cooling air to be supplied to the lower freezer compartment and disposed behind the lower freezer compartment; an ice-making chamber cooler (62, 262) configured to generate cooling air to be supplied to the ice-making chamber and disposed in a cooling chamber (60, 260); a cooling air duct (70, 270) configured to connect the ice-making chamber and the cooling chamber (60, 260) to supply the cooling air generated by the cooler (62, 262) to the ice-making chamber and to collect the air of the ice-making chamber; characterized by further comprising: a blower fan (63, 269) disposed in the cooling chamber (60, 260) and configured to circulate cooling air between the ice-making chamber and the cooling chamber (60, 260) through the cooling air duct (70, 270), wherein the cooling chamber (60, 260) is formed inside a cooling chamber case (61, 261) installed to be buried in the insulation of the wall (12, 13, 14, 15, 16, 17). a main body including a wall (12, 13, 14, 15, 16, 17) having an inner box, an outer box, and an insulation provided between the inner box and the outer box; an upper refrigerator compartment and a lower freezer compartment formed by the wall (12, 13, 14, 15, 16, 17); a door (30, 31) rotatably coupled to the main body configured to open and close the refrigerator compartment, and including an ice-making chamber formed in a front surface of the door (30, 31) to be separated and insulated from the refrigerator compartment; a refrigerator compartment cooler configured to generate cooling air to be supplied to the upper refrigerator compartment and disposed behind the upper refrigerator compartment; a freezer compartment cooler to generate cooling air to be supplied to the lower freezer compartment and disposed behind the lower freezer compartment; an ice-making chamber cooler (62, 262) configured to generate cooling air to be supplied to the ice-making chamber and disposed in a cooling chamber (60, 260); a cooling air duct (70, 270) configured to connect the ice-making chamber and the cooling chamber (60, 260) to supply the cooling air generated by the cooler (62, 262) to the ice-making chamber and to collect the air of the ice-making chamber; characterized by further comprising: a blower fan (63, 269) disposed in the cooling chamber (60, 260) and configured to circulate cooling air between the ice-making chamber and the cooling chamber (60, 260) through the cooling air duct (70, 270), wherein the cooling chamber (60, 260) is formed inside a cooling chamber case (61, 261) installed to be buried in the insulation of the wall (12, 13, 14, 15, 16, 17). a blower fan (63, 269) disposed in the cooling chamber (60, 260) and configured to circulate cooling air between the ice-making chamber and the cooling chamber (60, 260) through the cooling air duct (70, 270), wherein the cooling chamber (60, 260) is formed inside a cooling chamber case (61, 261) installed to be buried in the insulation of the wall (12, 13, 14, 15, 16, 17).