A compressor system comprising: a crankshaft that is configured to rotate about an axial line; a compression mechanism unit which includes a piston rotor (13A, 13B) that is configured to rotate eccentrically with rotation of the crankshaft, and a cylinder (12A, 12B) having a compression chamber (R1, R2) accommodating the piston rotor formed inside; a housing which accommodates the crankshaft and the compression mechanism unit and which is configured to allow a high-pressure refrigerant generated by the compression mechanism unit to flow therethrough; an accumulator in which the refrigerant is stored; and a suction pipe (26A, 26B) in which an insertion end portion (42, 242, 342) to be inserted into a suction port (23A, 23B, 323A) formed in the cylinder is formed at an end portion and which is configured to supply the refrigerant before compression from the accumulator to the compression chamber, wherein, between an outer peripheral surface of the insertion end portion and an inner peripheral surface of the suction port, an abutment region in which the outer peripheral surface of the insertion end portion and the inner peripheral surface of the suction port abut each other, and a non-abutment region forming a space between the outer peripheral surface of the insertion end portion and the inner peripheral surface of the suction port are formed, the compressor system being characterized in that, the suction port (23A, 23B, 323A) or the insertion end portion (42, 242, 342) has a circular cross section, and when the suction port (23A, 23B, 323A) has a circular cross section, the insertion end portion (42, 242, 342) has an elliptical cross section, an end edge in a major axis direction of the ellipse forming the abutment region, and an end edge in a minor axis direction forming the non-abutment region, and when the insertion end portion (42, 242, 342) has a circular cross section, the suction port has an elliptical cross section, an end edge in the minor axis direction of the ellipse forming the abutment region, and an end edge in the major axis direction forming the non-abutment region. a crankshaft that is configured to rotate about an axial line; a compression mechanism unit which includes a piston rotor (13A, 13B) that is configured to rotate eccentrically with rotation of the crankshaft, and a cylinder (12A, 12B) having a compression chamber (R1, R2) accommodating the piston rotor formed inside; a housing which accommodates the crankshaft and the compression mechanism unit and which is configured to allow a high-pressure refrigerant generated by the compression mechanism unit to flow therethrough; an accumulator in which the refrigerant is stored; and a suction pipe (26A, 26B) in which an insertion end portion (42, 242, 342) to be inserted into a suction port (23A, 23B, 323A) formed in the cylinder is formed at an end portion and which is configured to supply the refrigerant before compression from the accumulator to the compression chamber, wherein, between an outer peripheral surface of the insertion end portion and an inner peripheral surface of the suction port, an abutment region in which the outer peripheral surface of the insertion end portion and the inner peripheral surface of the suction port abut each other, and a non-abutment region forming a space between the outer peripheral surface of the insertion end portion and the inner peripheral surface of the suction port are formed, the compressor system being characterized in that, the suction port (23A, 23B, 323A) or the insertion end portion (42, 242, 342) has a circular cross section, and when the suction port (23A, 23B, 323A) has a circular cross section, the insertion end portion (42, 242, 342) has an elliptical cross section, an end edge in a major axis direction of the ellipse forming the abutment region, and an end edge in a minor axis direction forming the non-abutment region, and when the insertion end portion (42, 242, 342) has a circular cross section, the suction port has an elliptical cross section, an end edge in the minor axis direction of the ellipse forming the abutment region, and an end edge in the major axis direction forming the non-abutment region.