To solve problems of a conventional 2-cylinder hermetic rotary compressor, in which a cylinder is distorted and deformed caused by tightening of a bolt in assembly, welding and fixing to a sealed vessel, and welding of a suction pipe to cause increase in leakage loss and degradation in performance, or in which clearance between a rotor and a stator of an electric motor is changed, and electromagnetic noise might be increased. In this rotary compressor, the size in a radial direction of a first bearing is approximately the same as that of a second bearing. In assembly of both bearings with both cylinders of a compression element part, the first bearing is assembled with a first cylinder by tightening by bolts at a position in a radial direction of the first bearing with a predetermined distance from the tip, the second bearing is directly assembled with a second cylinder by tightening of bolts at a position spaced by a predetermined distance from the tip of the second bearing in a radial direction, and both of the cylinders are directly assembled by tightening by a bolt through an intermediate partition board. The bolt tightening the cylinders is disposed at a position closer to the inside in the radial direction from the tip of each bearing with a predetermined distance.