A temperature maintaining case includes a main body having a recessed storage chamber formed by a heat-insulating wall, and a lid body mounted on the main body capable of closing an opening of the storage chamber. Further, the temperature maintaining case includes: a heat storage member exposed to the storage chamber; a thermoelectric device having a first heat transferring surface and a second heat transferring surface opposite to the first heat transferring surface, the first heat transferring surface being connected to the heat storage member; a control device configured to drive and control the thermoelectric device; and a cover member mounted on the main body. The cover member is capable of selecting an exposed state and a shielded state.