A showcase is disclosed. The showcase includes a display module (10). By using the light source (13) and the light guiding plate (12) of the display module (10), a portion of light generated by the light source (13) can be emitted through the rear surface of the light guiding plate (12) to illuminate an object (P) and then the portion of light source (13) can be regathered into the light guiding plate (12) again to illuminate the display module (10).
