PURPOSE: To improve thermal conductivity to a vessel, and to execute exact temperature control.

CONSTITUTION: The storage device is provided with a heat insulation case 2 whose upper face is opened, and which stores a liquid 3 such as brine or water in the inside, a food preservation vessel 1 contained in the heat insulation case 2 so as to put in and out freely, a pair of projections 5 protruded and formed to the inside on an inner wall of the heat insulation case 2, and a detaining member 4 having a notch 4B retained to the projections 5 so as to be freely insertable and detachable, and for retaining the vessel 1.