To prevent the counterflow of the thawing water of chip shaped ice in an ice storage tank to an ice making machine from a discharge part, the leakage of cold air in the ice storage tank from a drain hole provided on the bottom part of the ice storage tank, the drop of the chip shaped ice in the ice storage tank through the drain hole, and the entry of the odor of drain into the ice storage tank through the drain hole by fully considering the treatment of the thawing water of the chip shaped ice generated in the ice storage talc in an ice storage type display stand.

This drain mechanism 50b comprises a drain tank 55, a drain hole 16e provided at a position lower than the discharge part of chip shaped ice on the bottom part of an ice storage tank, and a drain hose 56 connected to the drain hole 16e and having a lower end part facing the drain tank 55. The drain hole 16e is covered with a cover member 56a formed with a large diameter and an outlet hole 56a1 by which the flow of chip shaped ice is regulated and water is allowed to be passed.