A refrigerator having a first storage compartment with a first storage space defined therein; an inner door to open and close the first storage space, wherein the inner door has an inner door receiving space that is separate from the first storage space; a receiving casing attached to a back face of the inner door; and an outer door pivotally mounted to the inner door to open and close the inner door receiving space, wherein the receiving casing includes a frame surrounding the inner door receiving space, wherein the frame has a cold-air hole defined therein, and a transparent plate attached to the frame to separate the inner door receiving space from the first storage space.