A linear compressor comprising: a cylinder defining a compression space for a refrigerant; a frame accommodating the cylinder therein; and a discharge unit defining a discharge space for the refrigerant, in which the refrigerant discharged from the compression space flows, wherein the frame comprises: a discharge frame surface coupled to the discharge unit; and a gas hole recessed from the discharge frame surface, wherein the discharge unit comprises a bearing refrigerant passage extending toward the gas hole so that a portion of the refrigerant flowing into the discharge space flows to the gas hole via the bearing refrigerant passage, wherein at least a portion of the bearing refrigerant passage is provided inside the gas hole, wherein the discharge unit comprises: a discharge cover coupled to the discharge frame surface; and a discharge plenum (192, 292, 392, 492) accommodated inside the discharge cover, and wherein the discharge plenum (192, 292, 392, 492) is provided with a plenum flange (1920, 2920, 3920, 4920) extending in a radial direction, wherein the discharge plenum (192, 292, 392, 492) comprises a bearing refrigerant hole (1923, 2923, 3923, 4923) penetrating the plenum flange (1920, 2920, 3920) and forming at least a portion of the bearing refrigerant passage, characterized in that the plenum flange (1920, 2920, 3920, 4920) has an outer surface that is in close contact with the inner side of the discharge cover. a cylinder defining a compression space for a refrigerant; a frame accommodating the cylinder therein; and a discharge unit defining a discharge space for the refrigerant, in which the refrigerant discharged from the compression space flows, wherein the frame comprises: a discharge frame surface coupled to the discharge unit; and a gas hole recessed from the discharge frame surface, wherein the discharge unit comprises a bearing refrigerant passage extending toward the gas hole so that a portion of the refrigerant flowing into the discharge space flows to the gas hole via the bearing refrigerant passage, wherein at least a portion of the bearing refrigerant passage is provided inside the gas hole, wherein the discharge unit comprises: a discharge cover coupled to the discharge frame surface; and a discharge plenum (192, 292, 392, 492) accommodated inside the discharge cover, and wherein the discharge plenum (192, 292, 392, 492) is provided with a plenum flange (1920, 2920, 3920, 4920) extending in a radial direction, wherein the discharge plenum (192, 292, 392, 492) comprises a bearing refrigerant hole (1923, 2923, 3923, 4923) penetrating the plenum flange (1920, 2920, 3920) and forming at least a portion of the bearing refrigerant passage, characterized in that the plenum flange (1920, 2920, 3920, 4920) has an outer surface that is in close contact with the inner side of the discharge cover. a discharge frame surface coupled to the discharge unit; and a gas hole recessed from the discharge frame surface, wherein the discharge unit comprises a bearing refrigerant passage extending toward the gas hole so that a portion of the refrigerant flowing into the discharge space flows to the gas hole via the bearing refrigerant passage, wherein at least a portion of the bearing refrigerant passage is provided inside the gas hole, wherein the discharge unit comprises: a discharge cover coupled to the discharge frame surface; and a discharge plenum (192, 292, 392, 492) accommodated inside the discharge cover, and wherein the discharge plenum (192, 292, 392, 492) is provided with a plenum flange (1920, 2920, 3920, 4920) extending in a radial direction, wherein the discharge plenum (192, 292, 392, 492) comprises a bearing refrigerant hole (1923, 2923, 3923, 4923) penetrating the plenum flange (1920, 2920, 3920) and forming at least a portion of the bearing refrigerant passage, characterized in that the plenum flange (1920, 2920, 3920, 4920) has an outer surface that is in close contact with the inner side of the discharge cover. a discharge cover coupled to the discharge frame surface; and a discharge plenum (192, 292, 392, 492) accommodated inside the discharge cover, and wherein the discharge plenum (192, 292, 392, 492) is provided with a plenum flange (1920, 2920, 3920, 4920) extending in a radial direction, wherein the discharge plenum (192, 292, 392, 492) comprises a bearing refrigerant hole (1923, 2923, 3923, 4923) penetrating the plenum flange (1920, 2920, 3920) and forming at least a portion of the bearing refrigerant passage, characterized in that the plenum flange (1920, 2920, 3920, 4920) has an outer surface that is in close contact with the inner side of the discharge cover.