A refrigerator including a main body having a storage compartment, a door rotatably provided on the main body to open and close the storage compartment, and an automatic water supply device. The automatic water supply device includes a water supply case, a bucket detachably mounted on the water supply case, and a water level sensor provided to detect a water level in the bucket, and is configured to supply water to the bucket depending on the water level in the bucket. The door includes a dyke protruding from a rear surface of the door to form an accommodation space in which the water supply case is accommodated, and the water supply case is coupled to the dyke.