A refrigerator comprising: an inner case comprising a storage compartment (50, 60) formed in an interior of the inner case, the storage compartment being partitioned into a refrigerating compartment and a freezing compartment, the inner case comprising a top wall, opposite side walls (22a, 22b), a rear wall and a bottom wall; an outer case coupled to an outside of the inner case; a body insulator interposed between the inner case and the outer case; and an ice making chamber case coupled to an inside of the inner case in the refrigerating compartment or the freezing compartment, the ice making chamber case forming an ice making chamber together with at least a portion of the inner case, wherein the ice making chamber case comprises a front opening, and a front edge formed along an outside of the front opening; characterized in that the ice making chamber case further comprises: a first ice making chamber case comprising a first horizontal wall and a first vertical wall, a second ice making chamber case coupled to an outside of the first ice making chamber case, the second ice making chamber case comprising a second horizontal wall and a second vertical wall, and a case insulator interposed between the first ice making chamber case and the second ice making chamber case, to insulate the ice making chamber, the case insulator being separate from the body insulator, wherein the front edge comprises: a first edge portion contacting the top wall, a second edge portion to form at least a portion of one of the first vertical wall and the second vertical wall, a third edge portion to form at least a portion of one of the first horizontal wall and the second horizontal wall, and a fourth edge portion contacting one of the side walls (22a, 22b). an inner case comprising a storage compartment (50, 60) formed in an interior of the inner case, the storage compartment being partitioned into a refrigerating compartment and a freezing compartment, the inner case comprising a top wall, opposite side walls (22a, 22b), a rear wall and a bottom wall; an outer case coupled to an outside of the inner case; a body insulator interposed between the inner case and the outer case; and an ice making chamber case coupled to an inside of the inner case in the refrigerating compartment or the freezing compartment, the ice making chamber case forming an ice making chamber together with at least a portion of the inner case, wherein the ice making chamber case comprises a front opening, and a front edge formed along an outside of the front opening; characterized in that the ice making chamber case further comprises: a first ice making chamber case comprising a first horizontal wall and a first vertical wall, a second ice making chamber case coupled to an outside of the first ice making chamber case, the second ice making chamber case comprising a second horizontal wall and a second vertical wall, and a case insulator interposed between the first ice making chamber case and the second ice making chamber case, to insulate the ice making chamber, the case insulator being separate from the body insulator, wherein the front edge comprises: a first edge portion contacting the top wall, a second edge portion to form at least a portion of one of the first vertical wall and the second vertical wall, a third edge portion to form at least a portion of one of the first horizontal wall and the second horizontal wall, and a fourth edge portion contacting one of the side walls (22a, 22b). a first edge portion contacting the top wall, a second edge portion to form at least a portion of one of the first vertical wall and the second vertical wall, a third edge portion to form at least a portion of one of the first horizontal wall and the second horizontal wall, and a fourth edge portion contacting one of the side walls (22a, 22b).