A reciprocating compressor including: a suction chamber disposed on one end side of a drive shaft and into which a refrigerant flows from a suction passage; a plurality of cylinder bores arranged around the drive shaft; a suction hole corresponding to each of the cylinder bores; and a discharge chamber in annular shape concentrically disposed outside the suction chamber, wherein pistons in the cylinder bores are reciprocated by rotation of the drive shaft to compress the refrigerant suctioned into the cylinder bores from the suction chamber via the suction hole and discharge the compressed refrigerant via the discharge chamber, the reciprocating compressor characterized by comprising: a partition member (150, 150') partitioning the suction chamber into a first space portion connected to the suction passage and a second space portion connected to the suction hole, and an aperture control valve that adjusts the area of an opening of a communication portion penetrating the partition member and providing communication between the first space portion and the second space portion, the aperture control valve being configured to increase the opening area as a pressure difference between the first space portion and the second space portion is increased and to decrease the opening area as the pressure difference is decreased. a suction chamber disposed on one end side of a drive shaft and into which a refrigerant flows from a suction passage; a plurality of cylinder bores arranged around the drive shaft; a suction hole corresponding to each of the cylinder bores; and a discharge chamber in annular shape concentrically disposed outside the suction chamber, wherein pistons in the cylinder bores are reciprocated by rotation of the drive shaft to compress the refrigerant suctioned into the cylinder bores from the suction chamber via the suction hole and discharge the compressed refrigerant via the discharge chamber, the reciprocating compressor characterized by comprising: a partition member (150, 150') partitioning the suction chamber into a first space portion connected to the suction passage and a second space portion connected to the suction hole, and an aperture control valve that adjusts the area of an opening of a communication portion penetrating the partition member and providing communication between the first space portion and the second space portion, the aperture control valve being configured to increase the opening area as a pressure difference between the first space portion and the second space portion is increased and to decrease the opening area as the pressure difference is decreased. a partition member (150, 150') partitioning the suction chamber into a first space portion connected to the suction passage and a second space portion connected to the suction hole, and an aperture control valve that adjusts the area of an opening of a communication portion penetrating the partition member and providing communication between the first space portion and the second space portion, the aperture control valve being configured to increase the opening area as a pressure difference between the first space portion and the second space portion is increased and to decrease the opening area as the pressure difference is decreased.