An adhesive-free frameless display device comprises a backplane, an optical element secured to a surface of the backplane, a display panel secured to a side of the optical element away from the backplane, and a fixing assembly. The fixing assembly comprises a middle frame, a combining member removably secured to the middle frame, and a fixing member removably secured to the middle frame. The fixing member fixes the backplane, the display panel, and the combining member together. An electronic device using the frameless display device is also provided.