An exemplary portable electronic device includes: a main body, a camera module, a protecting cover, and a fill-in light emitting module. The camera module has a camera, and the camera module is disposed in the main body. The camera is exposed and positioned against an outer surface of the main body to take pictures. The fill-in light emitting module is fixed on the protecting cover. The protecting cover is movably connected to the main body adjacent to the camera for covering the camera or exposing the camera.