A linear compressor comprising: a shell (101, 102, 103) configured to define an internal space; and a compressor body disposed in the internal space, wherein the shell (101, 102, 103) comprises: a shell body having both ends that are opened; and a suction shell cover and a discharge shell cover, which are respectively coupled to both the ends of the shell body to close the internal space, wherein the discharge shell cover comprises: a first portion extending in an axial direction to contact an inner surface of the shell body; a second portion extending from one side of the first portion in a radial direction to close one side of the internal space; and a third portion extending from the other side of the first portion in the radial direction to define a discharge shell opening, wherein the compressor body comprises: a frame accommodated in a cylinder; and a discharge cover coupled to the frame, wherein the second portion is disposed at a front side in the axial direction of the discharge cover, and the first portion is disposed outside the discharge cover in the radial direction to extend up to one side of the frame, characterized in that the discharge cover comprises: a cover flange part coupled to a front surface of the frame; and a chamber part extending forward from the cover flange part in the axial direction, wherein the third portion is disposed in the same line as the cover flange part in the radial direction, and wherein the discharge shell opening has a shape corresponding to that of the cover flange part and is defined outside the cover flange part in the radial direction. a shell (101, 102, 103) configured to define an internal space; and a compressor body disposed in the internal space, wherein the shell (101, 102, 103) comprises: a shell body having both ends that are opened; and a suction shell cover and a discharge shell cover, which are respectively coupled to both the ends of the shell body to close the internal space, a shell body having both ends that are opened; and a suction shell cover and a discharge shell cover, which are respectively coupled to both the ends of the shell body to close the internal space, wherein the discharge shell cover comprises: a first portion extending in an axial direction to contact an inner surface of the shell body; a second portion extending from one side of the first portion in a radial direction to close one side of the internal space; and a first portion extending in an axial direction to contact an inner surface of the shell body; a second portion extending from one side of the first portion in a radial direction to close one side of the internal space; and a third portion extending from the other side of the first portion in the radial direction to define a discharge shell opening, wherein the compressor body comprises: a frame accommodated in a cylinder; and a discharge cover coupled to the frame, wherein the second portion is disposed at a front side in the axial direction of the discharge cover, and the first portion is disposed outside the discharge cover in the radial direction to extend up to one side of the frame, a frame accommodated in a cylinder; and a discharge cover coupled to the frame, wherein the second portion is disposed at a front side in the axial direction of the discharge cover, and the first portion is disposed outside the discharge cover in the radial direction to extend up to one side of the frame, characterized in that the discharge cover comprises: a cover flange part coupled to a front surface of the frame; and a chamber part extending forward from the cover flange part in the axial direction, wherein the third portion is disposed in the same line as the cover flange part in the radial direction, and wherein the discharge shell opening has a shape corresponding to that of the cover flange part and is defined outside the cover flange part in the radial direction. a cover flange part coupled to a front surface of the frame; and a chamber part extending forward from the cover flange part in the axial direction, wherein the third portion is disposed in the same line as the cover flange part in the radial direction, and wherein the discharge shell opening has a shape corresponding to that of the cover flange part and is defined outside the cover flange part in the radial direction.