To transmit the light of a lamp into a cold storage room effectively through an illumination cover by providing the refrigerator with the illumination cover of such a size that it covers the whole region of the rear, in front of the rear plate of the cold storage room.

An illumination cover 17 excellent in design property can be made by setting an illumination cover 17 equivalent to a rear plate 14 or wider than it without regard to the width of the cavity 15 made in the rear board 14. Then, the illumination cover 17 becomes wider than the rear plate 14, so the light of a lamp 16 spreading through the illumination cover 17 reaches every corner of the cold storage room, and this can exhibit the illumination effect enough. Moreover, the back side of the cold storage room 1 is covered across the board with only the illumination cover 17, so this can give the user the impression of wildness and neatness all inside the refrigerator since the back side of the refrigerator is covered with only the illumination cover 17.