A mobile electronic device comprising: a display comprising a flat area and a curved surface area extending from the flat area as one piece therewith, the curved surface area being bent towards one side of the flat area, the curved surface area having a size smaller than that of the flat area; and a case disposed along an edge of the display, at least a part of the case protruding over a surface of the curved surface area, wherein the display comprises: an external protective layer formed in a shape corresponding to that of the flat area and the curved surface area; and a panel module disposed under the external protective layer, the panel module comprising a display area in which a plurality of pixels are arranged, and a non-display area in which a plurality of pads for supplying control signals to the pixels are arranged, wherein the display area is disposed over the flat area and a part of the curved surface area, the non-display area being disposed at the other part of the curved area, wherein an end of the panel module comprising the part of the non-display area further extends than an end of the curved surface area of the external protective layer for being inserted into a support groove formed within one side of the case, wherein a direction of a depth of the support groove is aligned to the bending direction of the end of the panel module; and wherein the depth of the support groove corresponds to a length of the non-display area. a display comprising a flat area and a curved surface area extending from the flat area as one piece therewith, the curved surface area being bent towards one side of the flat area, the curved surface area having a size smaller than that of the flat area; and a case disposed along an edge of the display, at least a part of the case protruding over a surface of the curved surface area, wherein the display comprises: an external protective layer formed in a shape corresponding to that of the flat area and the curved surface area; and a panel module disposed under the external protective layer, the panel module comprising a display area in which a plurality of pixels are arranged, and a non-display area in which a plurality of pads for supplying control signals to the pixels are arranged, an external protective layer formed in a shape corresponding to that of the flat area and the curved surface area; and a panel module disposed under the external protective layer, the panel module comprising a display area in which a plurality of pixels are arranged, and a non-display area in which a plurality of pads for supplying control signals to the pixels are arranged, wherein the display area is disposed over the flat area and a part of the curved surface area, the non-display area being disposed at the other part of the curved area, wherein an end of the panel module comprising the part of the non-display area further extends than an end of the curved surface area of the external protective layer for being inserted into a support groove formed within one side of the case, wherein a direction of a depth of the support groove is aligned to the bending direction of the end of the panel module; and wherein the depth of the support groove corresponds to a length of the non-display area.