A compressor, comprising: a stator generating an electromagnetic force inside the stator; a first rotary member rotating within the stator and around a first rotary shaft longitudinally extending concentrically with the center of the stator by a rotating electromagnetic field from the stator; a second rotary member having a second rotary shaft, a roller, and a vane; wherein the first rotary member includes a cylindrical rotor unit rotating within the stator and a cylinder unit inside the cylindrical rotor unit forming the compression space with the roller, the roller forming a compression space between the first and second rotary members (130, 140) while rotating, within the first rotary member, around the second rotary shaft upon receipt of a rotational force from the first rotary member, the vane transmitting the rotational force to the second rotary member from the first rotary member, and partitions the compression space into a suction region for sucking the refrigerant and a compression region for compressing/discharging the refrigerant, characterized in that the cylinder unit of the first rotary member comprises a vane mounting device and bushes for guiding the vane to reciprocate radially within the vane mounting device, the second rotary shaft, the roller and the vane are integrally formed with each other, and the center line of the second rotary shaft is spaced apart from the center line of the first rotary shaft, or the center line of the second rotary shaft coincides with the center line of the first rotary shaft and the longitudinal center line of the roller is spaced apart from the center lines of the first rotary shaft and second rotary shaft. a stator generating an electromagnetic force inside the stator; a first rotary member rotating within the stator and around a first rotary shaft longitudinally extending concentrically with the center of the stator by a rotating electromagnetic field from the stator; a second rotary member having a second rotary shaft, a roller, and a vane; wherein the first rotary member includes a cylindrical rotor unit rotating within the stator and a cylinder unit inside the cylindrical rotor unit forming the compression space with the roller, the roller forming a compression space between the first and second rotary members (130, 140) while rotating, within the first rotary member, around the second rotary shaft upon receipt of a rotational force from the first rotary member, the vane transmitting the rotational force to the second rotary member from the first rotary member, and partitions the compression space into a suction region for sucking the refrigerant and a compression region for compressing/discharging the refrigerant, characterized in that the cylinder unit of the first rotary member comprises a vane mounting device and bushes for guiding the vane to reciprocate radially within the vane mounting device, the second rotary shaft, the roller and the vane are integrally formed with each other, and the center line of the second rotary shaft is spaced apart from the center line of the first rotary shaft, or the center line of the second rotary shaft coincides with the center line of the first rotary shaft and the longitudinal center line of the roller is spaced apart from the center lines of the first rotary shaft and second rotary shaft.