An electronic device for widening an active area of a display is provided. The electronic device includes a housing including a first plate and a second plate facing away from the first plate, a touch screen display including a first glass plate, a second glass plate, and an organic light-emitting diode (OLED) layer interposed between the first plate and the second plate, a flexible layer including a first portion connected to the first surface of the second glass plate and bent around an edge of the second glass plate toward the second plate of the housing, and a second portion extending from the first portion and interposed between the second glass plate and the second plate of the housing, a display driver integrated circuit (DDIC) mounted on a first surface of the second portion of the flexible layer, and a printed circuit board (PCB) including a portion mounted on a second surface of the second portion of the flexible layer.