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 (6, 7) 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 (6, 7); and a partition member (9, 10) attached to the bearing member (6, 7) so as to form, together with the bearing member (6, 7), a refrigerant discharge space (51, 52) capable of retaining the refrigerant discharged from the discharge chamber through the discharge port, characterized in that the bearing member (6, 7) 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 (6, 7) 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 (6, 7); and a partition member (9, 10) attached to the bearing member (6, 7) so as to form, together with the bearing member (6, 7), a refrigerant discharge space (51, 52) 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 (6, 7); and a partition member (9, 10) attached to the bearing member (6, 7) so as to form, together with the bearing member (6, 7), a refrigerant discharge space (51, 52) capable of retaining the refrigerant discharged from the discharge chamber through the discharge port, characterized in that the bearing member (6, 7) 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.