To attain energy saving for sufficiently exhibiting a heat insulation effect with a heat insulating material.

A container body 1 is constituted by storing a vacuum double container as an inner container 3 in an outer case 2, an electric hot-water storage container has a lid body 13 opening and closing the opening 12 of the container body 1 together with the opening section 3a of the inner container 3, a heating source 11 heating the contained liquid in the inner container 3, and the vacuum heat insulating material 131 arranged around the outer periphery of the inner container 3, the above object is attained by providing a predetermined gap 201 between the vacuum heat insulating material 131 and the inner container 3.