To provide a cold reserving shutter opening/closing apparatus for an open showcase for use in storing food at low temperatures, which is made compact in construction by combining the apparatus with a main body of the showcase, achieves widespread use thereof by reducing a cost thereof, to thereby realize energy saving, improves its cold reserving performance and workability of attaching/detaching operation, and air-dries generated condensation when housed.

A standardly arranged showcase main body has a top board on which a housing case is provided with a plurality of rollers arranged therein in parallel, whereby the cold-reserving shutter opening/closing apparatus can pull up a shutter while maintaining an expanded position. Further, a front service box upper portion is divided to form a hinged built-in box-type cover, whereby the shutter can be simultaneously opened or closed together with an internal device. Still further, the shutter is of a hermetically sealed structure using expandable fasteners and seal chucks on both longitudinal edges thereof, and facilitates its attachment and detachment. Alternatively, the shutter may be of a sliding door type, whereby it can be housed on a side or rear portion of the showcase main body.