A refrigerator comprising; a cabinet comprising an inner case, which is laterally divided by a vertical partition wall to form a cooling compartment and a freezer compartment, and an outer case, which is disposed on an outer side of the inner case while interposing a heat insulation space, in which thermal insulating material is formed, between the outer case and the inner case; an upper door and a lower door rotatably installed on the cabinet to independently open and close an upper portion and a lower portion of the cooling compartment while dividing the cooling compartment into the upper portion and the lower portion; a pillar unit rotatably installed at either of the upper door or the lower door to seal a gap between the upper door and the lower door; an upper hinge part configured to rotatably support an upper portion of the upper door; a lower hinge part configured to rotatably support a lower portion of the lower door; a hinge bracket disposed between the upper door and the lower door, comprising an upper hinge pin and a lower hinge pin, which are configured to rotatably support a lower portion of the upper door and an upper portion of the lower door, respectively, and coupled to an outer surface of the outer case; and a reinforcing bracket provided on an inner surface of the outer case while being coupled to the hinge bracket such that rigidity of the hinge bracket is reinforced, wherein the hinge bracket comprises a lateral side plate supported by a lateral side of the cabinet, a front-side plate bentedly extending from the lateral side plate and supported by a front side of the cabinet, and a hinge plate through which the upper hinge pin and the lower hinge pin protrude, and wherein the reinforcing bracket comprises a lateral side support part, which is coupled to a connecting member that passes through the lateral side plate, and a front side support part, which bentedly extends from the lateral side support part and is coupled to a connecting member that passes through the front side plate. a cabinet comprising an inner case, which is laterally divided by a vertical partition wall to form a cooling compartment and a freezer compartment, and an outer case, which is disposed on an outer side of the inner case while interposing a heat insulation space, in which thermal insulating material is formed, between the outer case and the inner case; an upper door and a lower door rotatably installed on the cabinet to independently open and close an upper portion and a lower portion of the cooling compartment while dividing the cooling compartment into the upper portion and the lower portion; a pillar unit rotatably installed at either of the upper door or the lower door to seal a gap between the upper door and the lower door; an upper hinge part configured to rotatably support an upper portion of the upper door; a lower hinge part configured to rotatably support a lower portion of the lower door; a hinge bracket disposed between the upper door and the lower door, comprising an upper hinge pin and a lower hinge pin, which are configured to rotatably support a lower portion of the upper door and an upper portion of the lower door, respectively, and coupled to an outer surface of the outer case; and a reinforcing bracket provided on an inner surface of the outer case while being coupled to the hinge bracket such that rigidity of the hinge bracket is reinforced, wherein the hinge bracket comprises a lateral side plate supported by a lateral side of the cabinet, a front-side plate bentedly extending from the lateral side plate and supported by a front side of the cabinet, and a hinge plate through which the upper hinge pin and the lower hinge pin protrude, and