A refrigerator comprising: a body having a refrigerating compartment ; a refrigerating compartment door mounted to the body , to open or close the refrigerating compartment ; an ice making compartment provided at the refrigerating compartment door ; an ice making device arranged in the ice making compartment ; an ice making tray provided at the ice making device and configured to receive and retain liquid be frozen into ice; a cold air inlet (51; 151) provided at the ice making compartment and configured to allow cold air to be introduced into the ice making compartment ; and a cold air guide (60; 161) configured to guide cold air entering the ice making compartment through the cold air inlet (51; 151) toward the ice making tray; characterized in that: (a) either: - the cold air inlet is arranged at a side wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the side wall of the ice making compartment while being arranged over the ice making tray ; (b) or: - the cold air inlet is arranged at a top wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the top wall of the ice making compartment . a body having a refrigerating compartment ; a refrigerating compartment door mounted to the body , to open or close the refrigerating compartment ; an ice making compartment provided at the refrigerating compartment door ; an ice making device arranged in the ice making compartment ; an ice making tray provided at the ice making device and configured to receive and retain liquid be frozen into ice; a cold air inlet (51; 151) provided at the ice making compartment and configured to allow cold air to be introduced into the ice making compartment ; and a cold air guide (60; 161) configured to guide cold air entering the ice making compartment through the cold air inlet (51; 151) toward the ice making tray; characterized in that: (a) either: - the cold air inlet is arranged at a side wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the side wall of the ice making compartment while being arranged over the ice making tray ; (b) or: - the cold air inlet is arranged at a top wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the top wall of the ice making compartment . (a) either: - the cold air inlet is arranged at a side wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the side wall of the ice making compartment while being arranged over the ice making tray ; - the cold air inlet is arranged at a side wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the side wall of the ice making compartment while being arranged over the ice making tray ; (b) or: - the cold air inlet is arranged at a top wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the top wall of the ice making compartment . - the cold air inlet is arranged at a top wall of the ice making compartment ; and - the cold air guide is mounted to an inner surface of the top wall of the ice making compartment . <EOS>