PURPOSE: To propose a cold reserving container in which dew drops on a surface of a cold reserving agent is surely prevented from dripping down on an object to be kept cool, the object to be kept cool is prevented from being wet, stained, or partially freezed, these advantages can be simply and easily realized, and a labor for throwing collected dew drops away is not requited.

CONSTITUTION: In a cold reserving container 5, an object to be kept cool A is contained in an inner containing space 3, a unit shelf 10 is detachably mounted above the containing space 3, and a cold reserving agent B, such as dry ice, is contained in the unit shelf 10 for keeping the object B cool by the cold C thereof traveling downward. The unit shelf 10 is provided with a recessed receiver part 11 for containing the cold reserving agent B and further for collecting dew drops D produced on the surface of the cold reserving agent B and a cold air hole 12 for permitting the cold C from the cold reserving agent B to travel downward into the containing space 3. Furthermore, the receiving part 11 is provided with a recovery hole 15 and connected to a recovery tank 17 through a recovery tube 16.