A refrigerator, comprising: a main body; a door rotatably coupled to the main body; a first ice making compartment configured to generate and store ice, and provided in the main body; a second ice making compartment provided in the door and configured to crush ice by a crushing device, disposed in the second ice making compartment; a transfer device configured to transfer the ice in the first ice making compartment to the second ice making compartment; wherein the refrigerator further comprises: a storage compartment provided in the main body, wherein the door comprises a door body part provided to open and close the storage compartment and a second ice making housing in which the second ice making compartment is disposed; wherein the first ice making compartment containing an ice bucket configured to store the ice is located in a substantially lower portion of the storage compartment; a dispenser configured for providing ice to the outside is provided in the door body part; an ice discharge opening configured to discharge the ice of the second ice making compartment to the dispenser is provided in the second ice making housing; and a rotating blade of the crushing device inclinedly disposed transfers upward the ice from the second ice making compartment, wherein the height of the ice discharge opening is set to be higher than a bottom of the ice bucket. a main body; a door rotatably coupled to the main body; a first ice making compartment configured to generate and store ice, and provided in the main body; a second ice making compartment provided in the door and configured to crush ice by a crushing device, disposed in the second ice making compartment; a transfer device configured to transfer the ice in the first ice making compartment to the second ice making compartment; wherein the refrigerator further comprises: a storage compartment provided in the main body, wherein the door comprises a door body part provided to open and close the storage compartment and a second ice making housing in which the second ice making compartment is disposed; wherein the first ice making compartment containing an ice bucket configured to store the ice is located in a substantially lower portion of the storage compartment; a dispenser configured for providing ice to the outside is provided in the door body part; an ice discharge opening configured to discharge the ice of the second ice making compartment to the dispenser is provided in the second ice making housing; and a rotating blade of the crushing device inclinedly disposed transfers upward the ice from the second ice making compartment, wherein the height of the ice discharge opening is set to be higher than a bottom of the ice bucket. a storage compartment provided in the main body, wherein the door comprises a door body part provided to open and close the storage compartment and a second ice making housing in which the second ice making compartment is disposed; wherein the first ice making compartment containing an ice bucket configured to store the ice is located in a substantially lower portion of the storage compartment; a dispenser configured for providing ice to the outside is provided in the door body part; an ice discharge opening configured to discharge the ice of the second ice making compartment to the dispenser is provided in the second ice making housing; and a rotating blade of the crushing device inclinedly disposed transfers upward the ice from the second ice making compartment, wherein the height of the ice discharge opening is set to be higher than a bottom of the ice bucket.