A refrigerator includes 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 configured to crush ice and provided in the door, and a transfer device provided to transfer the ice in the first ice making compartment to the second ice making compartment. Therefore, a structure of an ice bucket storing ice is simplified, and an ice making system is easily constructed.