A linear compressor comprising: a frame; a cylinder disposed in the frame and fixed to an inner surface of the frame; a piston disposed in the cylinder and configured to reciprocate along the cylinder; a discharge valve assembly disposed forward relative to the piston and configured to open or close a compression space formed between the cylinder and the piston; and a discharge cover assembly coupled to the frame and disposed forward relative to the piston, the discharge cover assembly being disposed to cover a front side of the discharge valve assembly, wherein the discharge cover assembly comprises: a discharge cover forming an inner space; and a first discharge plenum disposed in the discharge cover and configured to partition the inner space into a plurality of discharge spaces (104a, 104b, 104c), the first discharge plenum being in close contact with an inner surface of the discharge cover, wherein the discharge cover comprises a first discharge hole that communicates the inner space of the discharge cover and guides refrigerant in the inner space to an outside of the discharge cover, characterized in that the discharge cover assembly further comprises: a second discharge plenum disposed forward relative to the first discharge plenum and being in close contact with the inner surface of the discharge cover, the second discharge plenum comprises a second discharge hole that communicates the plurality of discharge spaces (104a, 104b, 104c) and guides refrigerant in the discharge spaces to the first discharge hole, and the inner surface of the discharge cover is sealed by the first discharge plenum and the second discharge plenum in an area other than an area in which the second discharge hole and the first discharge hole are disposed. a frame; a cylinder disposed in the frame and fixed to an inner surface of the frame; a piston disposed in the cylinder and configured to reciprocate along the cylinder; a discharge valve assembly disposed forward relative to the piston and configured to open or close a compression space formed between the cylinder and the piston; and a discharge cover assembly coupled to the frame and disposed forward relative to the piston, the discharge cover assembly being disposed to cover a front side of the discharge valve assembly, wherein the discharge cover assembly comprises: a discharge cover forming an inner space; and a first discharge plenum disposed in the discharge cover and configured to partition the inner space into a plurality of discharge spaces (104a, 104b, 104c), the first discharge plenum being in close contact with an inner surface of the discharge cover, wherein the discharge cover comprises a first discharge hole that communicates the inner space of the discharge cover and guides refrigerant in the inner space to an outside of the discharge cover, characterized in that the discharge cover assembly further comprises: a second discharge plenum disposed forward relative to the first discharge plenum and being in close contact with the inner surface of the discharge cover, the second discharge plenum comprises a second discharge hole that communicates the plurality of discharge spaces (104a, 104b, 104c) and guides refrigerant in the discharge spaces to the first discharge hole, and the inner surface of the discharge cover is sealed by the first discharge plenum and the second discharge plenum in an area other than an area in which the second discharge hole and the first discharge hole are disposed. a discharge cover forming an inner space; and a first discharge plenum disposed in the discharge cover and configured to partition the inner space into a plurality of discharge spaces (104a, 104b, 104c), the first discharge plenum being in close contact with an inner surface of the discharge cover, wherein the discharge cover comprises a first discharge hole that communicates the inner space of the discharge cover and guides refrigerant in the inner space to an outside of the discharge cover, characterized in that the discharge cover assembly further comprises: a second discharge plenum disposed forward relative to the first discharge plenum and being in close contact with the inner surface of the discharge cover, the second discharge plenum comprises a second discharge hole that communicates the plurality of discharge spaces (104a, 104b, 104c) and guides refrigerant in the discharge spaces to the first discharge hole, and the inner surface of the discharge cover is sealed by the first discharge plenum and the second discharge plenum in an area other than an area in which the second discharge hole and the first discharge hole are disposed. a second discharge plenum disposed forward relative to the first discharge plenum and being in close contact with the inner surface of the discharge cover, the second discharge plenum comprises a second discharge hole that communicates the plurality of discharge spaces (104a, 104b, 104c) and guides refrigerant in the discharge spaces to the first discharge hole, and the inner surface of the discharge cover is sealed by the first discharge plenum and the second discharge plenum in an area other than an area in which the second discharge hole and the first discharge hole are disposed.