A compressor comprising: a cylinder main body of a rotary compression mechanism ; a bearing provided on one surface side of the cylinder main body and supporting a drive shaft ; and a plate portion disposed on one surface side of the bearing , wherein the bearing includes: a wall portion formed rising from the one surface of the bearing and extending in two different directions from a center side of the bearing along a radial direction thereof; a refrigerant circulation section surrounded by the wall portion , an outer peripheral wall of the bearing , a center wall of the bearing , and the plate portion , the refrigerant circulation section being configured to allow refrigerant discharged from the cylinder main body to circulate thereto; and a recessed portion formed on the bearing by the outer peripheral wall of the bearing , the center wall of the bearing and the wall portion , and a heat-blocking section surrounded by the recessed portion and the plate portion, and separated from the refrigerant circulation section by the wall portion and the plate portion to prevent the refrigerant from circulating thereto, characterized in that the bearing further includes a first rib that is formed rising from the one surface of the bearing and extending from the center wall to the outer peripheral wall along the radial direction of the bearing in the heat-blocking section . a cylinder main body of a rotary compression mechanism ; a bearing provided on one surface side of the cylinder main body and supporting a drive shaft ; and a plate portion disposed on one surface side of the bearing , wherein the bearing includes: a wall portion formed rising from the one surface of the bearing and extending in two different directions from a center side of the bearing along a radial direction thereof; a refrigerant circulation section surrounded by the wall portion , an outer peripheral wall of the bearing , a center wall of the bearing , and the plate portion , the refrigerant circulation section being configured to allow refrigerant discharged from the cylinder main body to circulate thereto; and a recessed portion formed on the bearing by the outer peripheral wall of the bearing , the center wall of the bearing and the wall portion , and a wall portion formed rising from the one surface of the bearing and extending in two different directions from a center side of the bearing along a radial direction thereof; a refrigerant circulation section surrounded by the wall portion , an outer peripheral wall of the bearing , a center wall of the bearing , and the plate portion , the refrigerant circulation section being configured to allow refrigerant discharged from the cylinder main body to circulate thereto; and a recessed portion formed on the bearing by the outer peripheral wall of the bearing , the center wall of the bearing and the wall portion , and a heat-blocking section surrounded by the recessed portion and the plate portion, and separated from the refrigerant circulation section by the wall portion and the plate portion to prevent the refrigerant from circulating thereto, characterized in that the bearing further includes a first rib that is formed rising from the one surface of the bearing and extending from the center wall to the outer peripheral wall along the radial direction of the bearing in the heat-blocking section . <EOS>