A rotary compressor comprising: a closed casing comprising an oil reservoir ; a cylinder disposed inside the closed casing ; a piston disposed inside the cylinder ; a bearing member attached to the cylinder so as to form a cylinder chamber between the cylinder and the piston ; a vane that partitions the cylinder chamber into a suction chamber and a discharge chamber ; a suction port through which a refrigerant to be compressed is introduced into the suction chamber; a discharge port through which the compressed refrigerant is discharged from the discharge chamber , the discharge port being formed in the bearing member ; and a partition member attached to the bearing member so as to form, together with the bearing member , a refrigerant discharge space capable of retaining the refrigerant discharged from the discharge chamber through the discharge port , characterized in that the bearing member is provided with a first recess on the same side as the suction port with respect to a reference plane (H 1 , H 2 , H 3 ), the reference plane (H 1 , H 2 , H 3 ) being a plane including a central axis (O 1 ) of the cylinder and a point of contact between the cylinder and the piston when the vane protrudes maximally toward the central axis (O 1 ) of the cylinder , a portion of oil stored in the oil reservoir flows into the first recess , and thereby an oil retaining portion is formed, and the rotary compressor further comprises a communication path that communicates the oil reservoir with the oil retaining portion . a closed casing comprising an oil reservoir ; a cylinder disposed inside the closed casing ; a piston disposed inside the cylinder ; a bearing member attached to the cylinder so as to form a cylinder chamber between the cylinder and the piston ; a vane that partitions the cylinder chamber into a suction chamber and a discharge chamber ; a suction port through which a refrigerant to be compressed is introduced into the suction chamber; a discharge port through which the compressed refrigerant is discharged from the discharge chamber , the discharge port being formed in the bearing member ; and a partition member attached to the bearing member so as to form, together with the bearing member , a refrigerant discharge space capable of retaining the refrigerant discharged from the discharge chamber through the discharge port , characterized in that a vane that partitions the cylinder chamber into a suction chamber and a discharge chamber ; a suction port through which a refrigerant to be compressed is introduced into the suction chamber; a discharge port through which the compressed refrigerant is discharged from the discharge chamber , the discharge port being formed in the bearing member ; and a partition member attached to the bearing member so as to form, together with the bearing member , a refrigerant discharge space capable of retaining the refrigerant discharged from the discharge chamber through the discharge port , characterized in that the bearing member is provided with a first recess on the same side as the suction port with respect to a reference plane (H 1 , H 2 , H 3 ), the reference plane (H 1 , H 2 , H 3 ) being a plane including a central axis (O 1 ) of the cylinder and a point of contact between the cylinder and the piston when the vane protrudes maximally toward the central axis (O 1 ) of the cylinder , a portion of oil stored in the oil reservoir flows into the first recess , and thereby an oil retaining portion is formed, and the rotary compressor further comprises a communication path that communicates the oil reservoir with the oil retaining portion . a portion of oil stored in the oil reservoir flows into the first recess , and thereby an oil retaining portion is formed, and the rotary compressor further comprises a communication path that communicates the oil reservoir with the oil retaining portion . <EOS>