A door of a refrigerator includes a front panel formed of a metal material, a display unit including a display portion which is disposed at a rear side of the front panel and on which operating information of the refrigerator is displayed when the display portion becomes bright or dark, and a plurality of through holes formed in a region of the front panel corresponding to the display portion. Although the display unit is hidden inside the door, information displayed on the display unit can be seen to a user through the plurality of through holes.