A refrigerator includes a main body in which a storage compartment is formed, a door to open and close the storage compartment, and an ice maker provided on the door to generate ice, wherein the ice maker includes a frame having a water container mounting part, an ice making tray provided on the frame and in which ice is generated, and a water container detachably mounted on the frame to supply water to the ice making tray, and wherein the water container is configured such that at least a portion of the water container is opened when mounted on the water container mounting part.