Processing equipment for an object to be processed is provided with a process container, the internal of which can be evacuated, a gas introducing means for introducing a prescribed gas into the process container, a supporting table provided in the process container, a ring-shaped supporting part provided on the supporting table, a mounting plate for mounting the object to be processed and supported by the supporting part, a plurality of thermoelectric conversion elements provided on an upper plane of the supporting table on an inner side of the supporting part, an element storing space evacuating means for evacuating inside the element storing space formed by a lower surface of the mounting plate, which is supported by the supporting part, an upper plane of the supporting table and the supporting part.