A refrigeration cycle device comprising a compressor, a high pressure gas pipe, a condenser, a high pressure liquid pipe, a decompressor, an evaporator and a low pressure gas pipe, wherein the compressor includes an oil reservoir, an electric motor and a compressing mechanism all accommodated in a hermetic container, the electric motor and the compressing mechanism are connected to each other through a shaft, a first cylinder and a second cylinder are provided on both end surfaces of an intermediate plate of the compressing mechanism, the refrigeration cycle device further comprises a first frame and a second frame which rotatably hold the shaft, the compressing mechanism is composed of a first compressing mechanism disposed between the first frame and the intermediate plate, and a second compressing mechanism disposed between the second frame and the intermediate plate, the first compressing mechanism is composed of the first cylinder, a first piston disposed in the first cylinder, the first frame, and the intermediate plate, a first operation chamber is formed between an inner peripheral surface of the first cylinder and the first piston, the second compressing mechanism is composed of the second cylinder, a second piston disposed in the second cylinder, the second frame and the intermediate plate, a second operation chamber is formed between an inner peripheral surface of the second cylinder and the second piston, the refrigeration cycle device further comprises a first suction path for guiding working fluid into the first operation chamber, a second suction path for guiding working fluid into the second operation chamber, an inner space which is provided in the hermetic container and which is defined by an interior of the container, the first operation chamber and the second operation chamber, a communication path for guiding working fluid in the inner space to outside of the hermetic container, a first discharge port which is provided in the first frame and through which working fluid compressed in the first operation chamber flows out into the hermetic container, a first check valve which prevents working fluid passing through the first discharge port from returning from the hermetic container into the first discharge port, a second discharge port which is provided in the second frame and through which working fluid compressed in the second operation chamber flows out into the hermetic container, a second check valve which prevents working fluid passing through the second discharge port from returning from the hermetic container into the second discharge port, a third discharge port through which working fluid flows out from the inner space into the hermetic container, and a third check valve which prevents working fluid passing through the third discharge port from returning from the hermetic container into the third discharge port which is provided in the second frame, the low pressure gas pipe and the second suction path are connected to each other, and the refrigeration cycle device further comprises a control element which selectively connects the first suction path to one of the communication path and the low pressure gas pipe; wherein the first frame is provided with the third discharge port; wherein the second discharge port and the third discharge port are located higher than a liquid level in the oil reservoir; and wherein capacity of the second operation chamber is greater than capacity of the first operation chamber by configuring such that heights of the first cylinder and the second cylinder are set different from each other.