A rotary compressor, comprising: at least one cylinder in which a discharge guide groove is disposed at one side of a vane slot ; a roller which is orbitably provided in the cylinder , and disposed with a hinge groove on an outer circumferential surface thereof; a vane in which one end portion thereof is rotatably inserted into the hinge groove of the roller , and the other end portion thereof is slidably inserted into the vane slot of the cylinder ; and a plurality of bearing plates that seal both side surfaces of the cylinder , at least one side of the bearing plates being disposed with a discharge port to communicate with the discharge guide groove , characterized in that : a space (S) is defined between a side surface of the discharge side of the vane , one end of the discharge guide groove , and the outer circumferential surface of the roller , the space (S) is sealed while refrigerant remains, wherein the discharge port communicates with the space (S) such that refrigerant in the space (S) is discharged through the discharge port , wherein the discharge port is disposed such that at least part thereof overlaps with the vane when projected in an axial direction, and wherein the center (Oh) of the discharge port is disposed to be concentric with the center (Og) of the discharge guide groove . at least one cylinder in which a discharge guide groove is disposed at one side of a vane slot ; a roller which is orbitably provided in the cylinder , and disposed with a hinge groove on an outer circumferential surface thereof; a vane in which one end portion thereof is rotatably inserted into the hinge groove of the roller , and the other end portion thereof is slidably inserted into the vane slot of the cylinder ; and a plurality of bearing plates that seal both side surfaces of the cylinder , at least one side of the bearing plates being disposed with a discharge port to communicate with the discharge guide groove , characterized in that : a space (S) is defined between a side surface of the discharge side of the vane , one end of the discharge guide groove , and the outer circumferential surface of the roller , the space (S) is sealed while refrigerant remains, wherein the discharge port communicates with the space (S) such that refrigerant in the space (S) is discharged through the discharge port , wherein the discharge port is disposed such that at least part thereof overlaps with the vane when projected in an axial direction, and wherein the center (Oh) of the discharge port is disposed to be concentric with the center (Og) of the discharge guide groove . a space (S) is defined between a side surface of the discharge side of the vane , one end of the discharge guide groove , and the outer circumferential surface of the roller , the space (S) is sealed while refrigerant remains, wherein the discharge port communicates with the space (S) such that refrigerant in the space (S) is discharged through the discharge port , wherein the discharge port is disposed such that at least part thereof overlaps with the vane when projected in an axial direction, and wherein the center (Oh) of the discharge port is disposed to be concentric with the center (Og) of the discharge guide groove . <EOS>