A ceramic container includes a ceramic base having a hollow or open
portion for accommodating a battery element or an electric double layer
capacitor element, defined by a bottom portion and a side wall which
surrounds a bottom surface of the bottom portion which bottom face faces
the hollow or open portion, a ceramic coating layer formed on a periphery
of the bottom face along an inner face of the side wall, a first
metallized layer extending, on the bottom face, from a portion provided
immediately under the side wall to an inside of an inner end of the
ceramic coating layer via a portion provided immediately under the
ceramic coating layer, and a conductive layer formed on the bottom face
in order to cover an extended portion of the first metallized layer and
the ceramic coating layer.