To enable to start smoothly by reducing a leakage of a coolant from a compression part.

This compressor is formed such that a space is formed between a tooth crest of a lap 6b of a fixed scroll 6 and a bottom land 7c of a revolving scroll 7, a plate-like body 10 formed in the space like a disk thickness of which at mid section is greater than the center and the periphery is provided as well as forming a space between a tooth crest of a lap 7b of the revolving scroll 7 and a bottom land of the fixed scroll 6, a plate-like body 11 formed in the space like a disk thickness of which at mid center is greater than the center and the periphery is provided so as to suppress leakage of the pressurized coolant gas from the center as much as possible and enable to start smoothly on starting.