This disclosure is directed to an electronic device having a casing, a circular frame, and a display. A panel is arranged on one side of the casing, a circular opening is defined on the panel, and a first fixing structure is arranged on an inner edge of the circular opening. The circular frame is rotatably arranged in the circular opening to close the circular opening, a second fixing structure is arranged on an outer edge of the circular frame, and the second fixing structure is limited by the first fixing structure. The display is embedded in the circular frame and exposed on the panel, so that the display is rotatable according to various placing positions of the casing.