There is disclosed a multicylindrical rotary compressor capable of improving an operation efficiency during a small-capacity operation, the compressor comprises a controller as a control unit which adjusts a rotation number of an electromotive element as a driving element and which controls an operation of a power saving mechanism, and the controller operates the power saving mechanism to connect a high-pressure chamber side of a first cylinder to a low-pressure chamber side of a second cylinder during the small-capacity operation of a refrigerant circuit constituted in a rotary compressor (the multicylindrical rotary compressor).