A display device includes a housing unit, a display module, an electronic module and a stop mechanism. The housing unit includes a frame that has a front surface, an inner frame edge defining a window and a notch recessed from the inner frame edge. The display module includes a panel disposed at the front surface of the frame, and a display unit including a body located in the window and a lug corresponding to the notch. The stop mechanism includes a stop member disposed at the frame, and operable to switch between a locked state, where the stop member is disposed between the notch and the lug for restricting forward movement of the lug through the notch, and In a released state, where the lug is allowed to pass through the notch.