A linear compressor comprising: a discharge valve (145, 245, 345, 445, 545) detachably attached to a front end surface of a cylinder to open and close a compression space of the cylinder; and a valve spring elastically supporting a rear surface of the discharge valve (145, 245, 345, 445, 545) to press the discharge valve (145, 245, 345, 445, 545) toward the front end surface of the cylinder; wherein the discharge valve (145, 245, 345, 445, 545) includes reinforced fiber, and the reinforced fiber is arranged parallel to the front end surface of the cylinder, wherein the discharge valve (145, 245, 345, 445, 545) comprises: a valve body portion (145a, 245a, 345a, 445a, 545a) facing the front end surface of the cylinder; and a spring coupling portion (145b, 245b, 345b, 445b, 545b) provided on a rear surface of the valve body portion (145a, 245a, 345a, 445a, 545a), and the valve spring is coupled thereto, wherein the valve body portion (145a, 245a, 345a, 445a, 545a) is configured such that the reinforced fiber on a surface facing the front end surface of the cylinder is arranged parallel to the front end surface of the cylinder, wherein the reinforced fiber of the valve body portion (145a, 245a, 345a, 445a, 545a) and the reinforced fiber of the spring coupling portion (145b, 245b, 345b, 445b, 545b) are formed in different patterns. a discharge valve (145, 245, 345, 445, 545) detachably attached to a front end surface of a cylinder to open and close a compression space of the cylinder; and a valve spring elastically supporting a rear surface of the discharge valve (145, 245, 345, 445, 545) to press the discharge valve (145, 245, 345, 445, 545) toward the front end surface of the cylinder; wherein the discharge valve (145, 245, 345, 445, 545) includes reinforced fiber, and the reinforced fiber is arranged parallel to the front end surface of the cylinder, wherein the discharge valve (145, 245, 345, 445, 545) comprises: a valve body portion (145a, 245a, 345a, 445a, 545a) facing the front end surface of the cylinder; and a spring coupling portion (145b, 245b, 345b, 445b, 545b) provided on a rear surface of the valve body portion (145a, 245a, 345a, 445a, 545a), and the valve spring is coupled thereto, wherein the valve body portion (145a, 245a, 345a, 445a, 545a) is configured such that the reinforced fiber on a surface facing the front end surface of the cylinder is arranged parallel to the front end surface of the cylinder, wherein the reinforced fiber of the valve body portion (145a, 245a, 345a, 445a, 545a) and the reinforced fiber of the spring coupling portion (145b, 245b, 345b, 445b, 545b) are formed in different patterns. a valve body portion (145a, 245a, 345a, 445a, 545a) facing the front end surface of the cylinder; and a spring coupling portion (145b, 245b, 345b, 445b, 545b) provided on a rear surface of the valve body portion (145a, 245a, 345a, 445a, 545a), and the valve spring is coupled thereto, wherein the valve body portion (145a, 245a, 345a, 445a, 545a) is configured such that the reinforced fiber on a surface facing the front end surface of the cylinder is arranged parallel to the front end surface of the cylinder, wherein the reinforced fiber of the valve body portion (145a, 245a, 345a, 445a, 545a) and the reinforced fiber of the spring coupling portion (145b, 245b, 345b, 445b, 545b) are formed in different patterns.