To provide a compressor in which a tightening force required for tightening a member group comprising a cylinder and bearings contained therein is provided even if the member group is thinned, and which is improved in assemblability.

Members such as a bearing 14 and a bearing 15 having through holes are screwed with a member such as a cylinder 12 or the like having a screw hole extending therethrough with bolts 24 and bolts 25, respectively, which face each other. A bolt screw hole 29 is provided to the front end of the bolt 24, and a male screw 30 is provided to the front end of the bolt 25. The bolts 24, 25 are tightened to secure a required tightening force.