A refrigerator includes a cabinet that defines a first storage compartment, a first door that is opened or closed to allow or prevent access to an interior of the first storage compartment, a storing device coupled to the first door to define a second storage compartment, and a second door connected to the first door that is opened or closed to allow or prevent access to an interior of the second storage compartment. The first door includes a plurality of first coupling parts to which the storing device is coupled. The storing device includes a frame and a basket installed on the frame, each including at least one second coupling part interacting with at least one of the plurality of first coupling parts. A front surface of the second door is positioned to be generally coplanar with at least a portion of a front surface of the first door.