A rotary compressor comprising: at least one cylinder (33, 34) formed in an annular shape; bearing plates (31, 32) disposed on both sides of the at least one cylinder (33, 34) in an axial direction; at least one roller (361, 371) disposed in the at least one cylinder (33, 34); and at least one vane (362, 372) slidably inserted into the at least one cylinder (33, 34) and slid or coupled in contact with an outer circumferential surface of the at least one roller (361, 371), wherein the at least one cylinder (33, 34) comprises: a vane slot (332, 342) having an inner circumferential surface open so that the vane (362, 372) is slidably inserted therein, the vane slot (332, 342) including a slot portion defined by both circumferential side surfaces spaced apart from each other in a circumferential direction and recessed by a predetermined depth in the radial direction, and a space portion extending radially from the slot portion and formed through the at least one cylinder (33, 34) in the axial direction; a suction port (331, 341) having an inner circumferential surface open and disposed at one side of the vane slot (332, 342) in a circumferential direction; and a partition wall (333, 343) disposed between the slot portion of the vane slot (332, 342) and the suction port to partition the vane slot (332, 342) and the suction port (331, 341) from each other, and characterized in that the partition wall (333, 343) comprises an elastic portion (333f, 343f) formed in a penetrating or recessed manner in the circumferential direction at the circumferential side surfaces thereof defined by an inner surface of the slot portion of the vane slot (332, 342) and an inner surface of the suction port (331, 341), wherein the elastic portion (333f, 343f) is spaced apart from an inner circumferential surface of the cylinder (33, 34) and formed as an empty space. at least one cylinder (33, 34) formed in an annular shape; bearing plates (31, 32) disposed on both sides of the at least one cylinder (33, 34) in an axial direction; at least one roller (361, 371) disposed in the at least one cylinder (33, 34); and at least one vane (362, 372) slidably inserted into the at least one cylinder (33, 34) and slid or coupled in contact with an outer circumferential surface of the at least one roller (361, 371), wherein the at least one cylinder (33, 34) comprises: a vane slot (332, 342) having an inner circumferential surface open so that the vane (362, 372) is slidably inserted therein, the vane slot (332, 342) including a slot portion defined by both circumferential side surfaces spaced apart from each other in a circumferential direction and recessed by a predetermined depth in the radial direction, and a space portion extending radially from the slot portion and formed through the at least one cylinder (33, 34) in the axial direction; a suction port (331, 341) having an inner circumferential surface open and disposed at one side of the vane slot (332, 342) in a circumferential direction; and a partition wall (333, 343) disposed between the slot portion of the vane slot (332, 342) and the suction port to partition the vane slot (332, 342) and the suction port (331, 341) from each other, and a vane slot (332, 342) having an inner circumferential surface open so that the vane (362, 372) is slidably inserted therein, the vane slot (332, 342) including a slot portion defined by both circumferential side surfaces spaced apart from each other in a circumferential direction and recessed by a predetermined depth in the radial direction, and a space portion extending radially from the slot portion and formed through the at least one cylinder (33, 34) in the axial direction; a suction port (331, 341) having an inner circumferential surface open and disposed at one side of the vane slot (332, 342) in a circumferential direction; and a partition wall (333, 343) disposed between the slot portion of the vane slot (332, 342) and the suction port to partition the vane slot (332, 342) and the suction port (331, 341) from each other, and characterized in that the partition wall (333, 343) comprises an elastic portion (333f, 343f) formed in a penetrating or recessed manner in the circumferential direction at the circumferential side surfaces thereof defined by an inner surface of the slot portion of the vane slot (332, 342) and an inner surface of the suction port (331, 341), wherein the elastic portion (333f, 343f) is spaced apart from an inner circumferential surface of the cylinder (33, 34) and formed as an empty space.