A sealed case includes an elongated trunk member including an overlapped part made by overlapping parts of an inside end portion and an outside end portion apart from each other in a vertical axis direction of a sheet material and first and second end portions each provided with an opening and apart from each other. The overlapped part has a fixing area to fix the inside and outside end portions. First and second cover members are fixed to the first and second open end portions of the trunk member, closing the openings.
