A reciprocating compressor, comprising: - a driver configured to provide a rotary force; - a connecting rod coupled to the driver to convert a rotary motion to a linear motion; - a compression unit having a piston connected to the connecting rod to linearly reciprocate, and a cylinder configured to accommodate the piston and having a compression space for compressing a refrigerant by the linear reciprocating motion of the piston; - a suction/discharge part having a refrigerant inlet for supplying a refrigerant to the cylinder and a refrigerant outlet for discharging a refrigerant compressed in the cylinder, a rear surface portion of the suction/discharge part being disposed to face the cylinder; and - a valve assembly installed at a portion of the cylinder between the suction/discharge part and the cylinder to selectively allow a refrigerant to flow, the valve assembly including a valve plate; a suction inlet and a discharge outlet disposed at the valve plate, and configured to be in communication with the compression space of the cylinder to guide a refrigerant flow; a suction valve disposed at the valve plate to selectively open the suction inlet; and a discharge valve disposed at the valve plate to selectively open the discharge outlet; and - a clamp fixing the suction/discharge part to the compression unit, the clamp including a main body portion disposed in front of the suction/discharge part and a plurality of legs (473, 475, 477) extending from the main body portion toward the cylinder, each of the plurality of legs (473, 475, 477) extending from an edge portion forming an outer circumferential surface of the main body portion, characterized in that the reciprocating compressor further comprises: an elastic member mounted on a front surface portion of the suction/discharge part, the elastic member being disposed to face the main body portion of the clamp, and one side of the elastic member is supported by the suction/discharge part and the other side of the elastic member being supported by the clamp, such that the suction/discharge part and the cylinder are in close contact with each other by an elastic force of the elastic member. - a driver configured to provide a rotary force; - a connecting rod coupled to the driver to convert a rotary motion to a linear motion; - a compression unit having a piston connected to the connecting rod to linearly reciprocate, and a cylinder configured to accommodate the piston and having a compression space for compressing a refrigerant by the linear reciprocating motion of the piston; - a suction/discharge part having a refrigerant inlet for supplying a refrigerant to the cylinder and a refrigerant outlet for discharging a refrigerant compressed in the cylinder, a rear surface portion of the suction/discharge part being disposed to face the cylinder; and - a valve assembly installed at a portion of the cylinder between the suction/discharge part and the cylinder to selectively allow a refrigerant to flow, the valve assembly including a valve plate; a suction inlet and a discharge outlet disposed at the valve plate, and configured to be in communication with the compression space of the cylinder to guide a refrigerant flow; a suction valve disposed at the valve plate to selectively open the suction inlet; and a discharge valve disposed at the valve plate to selectively open the discharge outlet; and - a clamp fixing the suction/discharge part to the compression unit, the clamp including a main body portion disposed in front of the suction/discharge part and a plurality of legs (473, 475, 477) extending from the main body portion toward the cylinder, each of the plurality of legs (473, 475, 477) extending from an edge portion forming an outer circumferential surface of the main body portion, characterized in that the reciprocating compressor further comprises: an elastic member mounted on a front surface portion of the suction/discharge part, the elastic member being disposed to face the main body portion of the clamp, and one side of the elastic member is supported by the suction/discharge part and the other side of the elastic member being supported by the clamp, such that the suction/discharge part and the cylinder are in close contact with each other by an elastic force of the elastic member. an elastic member mounted on a front surface portion of the suction/discharge part, the elastic member being disposed to face the main body portion of the clamp, and one side of the elastic member is supported by the suction/discharge part and the other side of the elastic member being supported by the clamp, such that the suction/discharge part and the cylinder are in close contact with each other by an elastic force of the elastic member.