A refrigerator may include a first tray configured to form a portion of each of a plurality of ice making cells, and a second tray configured to be rotatable with respect to the first tray and to form the other portion of each of the plurality of ice making cells. Water supply is performed at the water supply position of the second tray. When water supply is completed, the second tray is moved to the ice making position. One or more of the first tray and the second tray is provided with a communication hole for communicating the plurality of ice making cells at the ice making position of the second tray.