A refrigerator of the present invention may comprise: a first tray assembly forming a part of an ice making cell; and a second tray assembly forming the other part of the ice making cell. The first tray assembly includes a first tray, and the second tray assembly includes a second tray. The second tray includes a first portion forming at least a portion of the ice making cell, and a second portion extending from a predetermined point of the first portion. The second portion includes a first extension part extending from a first point of the first portion and a second extension part extending from a second point of the first portion, wherein the length of the second extension part in the horizontal direction is formed longer than the length of the first extension part.