A folding mobile phone comprising a main body, a display sheathing and a pivot is provided. The main body comprises a button panel, and the display sheathing pivots on the main body. The display sheathing has two corresponding surfaces. Moreover, the display sheathing comprises a liquid crystal module, a light source and a light-guiding bar. Two light-guiding plates are respectively disposed over the two surfaces of the liquid crystal module. Each of the two corresponding surfaces exposes a portion of the light-guiding plate. Furthermore, the light source is disposed at a side of the liquid crystal module, and the light-guiding bar is disposed between the light source and the liquid crystal module. The light-guiding bar is connected with the pivot to swing between the two light-guiding plates and guides the light from the light source to one of the two light-guiding plates.