A refrigerator door, comprising: a front decoration defining a front external appearance of the refrigerator door; a door liner provided on a rear of the front decoration to define a rear external appearance of the refrigerator door; door decorations coupled to both sides of the front decoration to define both side external appearances of the refrigerator door and the door decorations having fastening grooves provided in the front ends thereof into which both side ends of the front decoration are inserted; cap decorations coupled to upper and lower ends of the front decoration to define top and bottom external appearances of the refrigerator door and the cap decorations having coupling grooves provided in edges thereof into which upper and lower ends of the front decoration are inserted and supported; an insulating layer filled in a space defined by the front decoration, the door decorations, the cap decorations and the door liner, the insulating layer being a solidified foam liquid; and a display portion installed on a rear surface of the front decoration and connected to a control section of the refrigerator, wherein the display portion is configured to receive an operating signal for operating a refrigerator by means of touch screen and including: a display section for informing a user of an operation condition of a refrigerator; and a control section for controlling an operating condition of the refrigerator by receiving a user's command, wherein the front decoration is formed of a transparent plate, and a rear surface of the front decoration is colored in a predetermined color, wherein the front decoration, consisting of one single plate, has: a transparent window, integral with the rest of the plate of the front decoration, and formed in a portion corresponding to the display section so that the display section can be observed; and input positions printed at positions corresponding to the control section of the display portion. a front decoration defining a front external appearance of the refrigerator door; a door liner provided on a rear of the front decoration to define a rear external appearance of the refrigerator door; door decorations coupled to both sides of the front decoration to define both side external appearances of the refrigerator door and the door decorations having fastening grooves provided in the front ends thereof into which both side ends of the front decoration are inserted; cap decorations coupled to upper and lower ends of the front decoration to define top and bottom external appearances of the refrigerator door and the cap decorations having coupling grooves provided in edges thereof into which upper and lower ends of the front decoration are inserted and supported; an insulating layer filled in a space defined by the front decoration, the door decorations, the cap decorations and the door liner, the insulating layer being a solidified foam liquid; and a display portion installed on a rear surface of the front decoration and connected to a control section of the refrigerator, wherein the display portion is configured to receive an operating signal for operating a refrigerator by means of touch screen and including: a display section for informing a user of an operation condition of a refrigerator; and a control section for controlling an operating condition of the refrigerator by receiving a user's command, wherein the front decoration is formed of a transparent plate, and a rear surface of the front decoration is colored in a predetermined color, wherein the front decoration, consisting of one single plate, has: a transparent window, integral with the rest of the plate of the front decoration, and formed in a portion corresponding to the display section so that the display section can be observed; and input positions printed at positions corresponding to the control section of the display portion. a display section for informing a user of an operation condition of a refrigerator; and a control section for controlling an operating condition of the refrigerator by receiving a user's command, wherein the front decoration is formed of a transparent plate, and a rear surface of the front decoration is colored in a predetermined color, wherein the front decoration, consisting of one single plate, has: a transparent window, integral with the rest of the plate of the front decoration, and formed in a portion corresponding to the display section so that the display section can be observed; and input positions printed at positions corresponding to the control section of the display portion.