A compressor comprising: a case; a first cylinder of a circular shape, arranged inside the case, providing a first chamber therein; a second cylinder of a circular shape, arranged inside the case, providing a second chamber therein; a partition arranged between the first cylinder and the second cylinder, partitioning the first chamber from the second chamber; a driving shaft including a first eccentric roller arranged in the first chamber to rotatably adjoin an inner circumferential surface of the first cylinder and a second eccentric roller arranged in the second chamber to rotatably adjoin an inner circumferential surface of the second cylinder, and passing through the first cylinder, the second cylinder and the partition, wherein the first eccentric roller and the second eccentric roller are configured to compress the flammable refrigerant, R-290; a first vane having one end fixed to the first cylinder and the other end which is in contact with the first eccentric roller, provided to reciprocate when the first eccentric roller is rotated; a second vane having one end fixed to the second cylinder and the other end which is in contact with the second eccentric roller, provided to reciprocate when the second eccentric roller is rotated; a first inlet port for flowing a refrigerant to the first chamber by passing through the first cylinder; a second inlet port for flowing a refrigerant to the second chamber by passing through the second cylinder; and a discharge portion including a first discharge port for discharging the refrigerant of the first chamber and a second discharge port for discharging the refrigerant of the second chamber, characterized in that each of the first eccentric roller and the second eccentric roller has a height-to-radius ratio of 0.75 or more and 0.8 or less, wherein a displacement or stroke volume of the compressor is 8cc/rev or more and 10cc/rev or less. a case; a first cylinder of a circular shape, arranged inside the case, providing a first chamber therein; a second cylinder of a circular shape, arranged inside the case, providing a second chamber therein; a partition arranged between the first cylinder and the second cylinder, partitioning the first chamber from the second chamber; a driving shaft including a first eccentric roller arranged in the first chamber to rotatably adjoin an inner circumferential surface of the first cylinder and a second eccentric roller arranged in the second chamber to rotatably adjoin an inner circumferential surface of the second cylinder, and passing through the first cylinder, the second cylinder and the partition, wherein the first eccentric roller and the second eccentric roller are configured to compress the flammable refrigerant, R-290; a first vane having one end fixed to the first cylinder and the other end which is in contact with the first eccentric roller, provided to reciprocate when the first eccentric roller is rotated; a second vane having one end fixed to the second cylinder and the other end which is in contact with the second eccentric roller, provided to reciprocate when the second eccentric roller is rotated; a first inlet port for flowing a refrigerant to the first chamber by passing through the first cylinder; a second inlet port for flowing a refrigerant to the second chamber by passing through the second cylinder; and a discharge portion including a first discharge port for discharging the refrigerant of the first chamber and a second discharge port for discharging the refrigerant of the second chamber, characterized in that each of the first eccentric roller and the second eccentric roller has a height-to-radius ratio of 0.75 or more and 0.8 or less, wherein a displacement or stroke volume of the compressor is 8cc/rev or more and 10cc/rev or less.