To provide a structural body which can be used even if it is broken by heat stress due to heat in operating of the structural body, to provide a using method of the structural body, and to provide a plasma generation object, an ozone generator and a wastes treatment apparatus, loading the structural body.

Each of the first insulation part 3 and the second insulation part 4 keeps one end fixed to a first side part 5, and the other end fixed to the second side part 6, and also a groove 7, a cavity 8 or a porous part is arranged at the first insulation part 3.