An object is to provide a showcase capable of effectively illuminating commodities displayed on a shelf in a display chamber, especially commodities in shelf foremost parts. In the showcase in which the shelf for displaying the commodities is disposed in the display chamber constituted in a main body and in which a front-surface opening of the display chamber is openably closed by see-through doors and in which an illumination device is vertically attached to the main body on an inner side from the edge of the opening, the illumination device is constituted of LED elements, and light from the LED elements is emitted toward front parts of the shelf.