The refrigerator includes a first tray forming a part of ice-making cells; and a second tray assembly forming the other part of the ice-making cells. The first tray assembly includes a first tray and a first tray case which supports the first tray, and the second tray assembly incudes a second tray and a second tray case which supports the second tray, and the degree of adhesion of ice to any one of the first and second trays is smaller than the degree of adhesion of ice to any one of the first and second tray cases or the degree of adhesion of ice to a metal.