A linear compressor comprising: a piston configured to reciprocate in a frontward direction and a rearward direction; a supporter configured to support the piston; a rear cover spaced apart from the supporter; and a spring assembly disposed between the supporter and the rear cover, wherein the spring assembly comprises: a plurality of spring parts (110, 120, 130), each of the plurality of spring parts having a first side portion that supports the supporter and a second side portion that supports the rear cover, and characterized by a pair of fixing brackets (200, 300) having a spring insertion portion (213, 313), respectively receiving the first side portion and the second side portion, wherein the pair of fixing brackets (200, 300) are respectively coupled to the supporter and the rear cover, wherein each one of the pair of fixing brackets (200, 300) comprises: a bracket main body (210, 310) having the spring insertion portion (213, 313); a body coupling portion (220, 320) disposed at two opposite sides of the bracket main body (210, 310); and a coupling member (65, 75, 330) that fastens the body coupling portion (220, 320) to the supporter or the rear cover, and wherein the bracket main body has at least one insertion hole (215a, 215b, 215c), an insertion member (251, 253, 255) being positioned in the at least one insertion hole (215as, 215b, 215c) to contact the first side portion or the second side portion of one of the plurality of spring parts (110, 120, 130). a piston configured to reciprocate in a frontward direction and a rearward direction; a supporter configured to support the piston; a rear cover spaced apart from the supporter; and a spring assembly disposed between the supporter and the rear cover, wherein the spring assembly comprises: a plurality of spring parts (110, 120, 130), each of the plurality of spring parts having a first side portion that supports the supporter and a second side portion that supports the rear cover, and characterized by a pair of fixing brackets (200, 300) having a spring insertion portion (213, 313), respectively receiving the first side portion and the second side portion, wherein the pair of fixing brackets (200, 300) are respectively coupled to the supporter and the rear cover, a plurality of spring parts (110, 120, 130), each of the plurality of spring parts having a first side portion that supports the supporter and a second side portion that supports the rear cover, and characterized by a pair of fixing brackets (200, 300) having a spring insertion portion (213, 313), respectively receiving the first side portion and the second side portion, wherein the pair of fixing brackets (200, 300) are respectively coupled to the supporter and the rear cover, wherein each one of the pair of fixing brackets (200, 300) comprises: a bracket main body (210, 310) having the spring insertion portion (213, 313); a body coupling portion (220, 320) disposed at two opposite sides of the bracket main body (210, 310); and a coupling member (65, 75, 330) that fastens the body coupling portion (220, 320) to the supporter or the rear cover, and wherein the bracket main body has at least one insertion hole (215a, 215b, 215c), an insertion member (251, 253, 255) being positioned in the at least one insertion hole (215as, 215b, 215c) to contact the first side portion or the second side portion of one of the plurality of spring parts (110, 120, 130). a bracket main body (210, 310) having the spring insertion portion (213, 313); a body coupling portion (220, 320) disposed at two opposite sides of the bracket main body (210, 310); and a coupling member (65, 75, 330) that fastens the body coupling portion (220, 320) to the supporter or the rear cover, and wherein the bracket main body has at least one insertion hole (215a, 215b, 215c), an insertion member (251, 253, 255) being positioned in the at least one insertion hole (215as, 215b, 215c) to contact the first side portion or the second side portion of one of the plurality of spring parts (110, 120, 130). a coupling member (65, 75, 330) that fastens the body coupling portion (220, 320) to the supporter or the rear cover, and wherein the bracket main body has at least one insertion hole (215a, 215b, 215c), an insertion member (251, 253, 255) being positioned in the at least one insertion hole (215as, 215b, 215c) to contact the first side portion or the second side portion of one of the plurality of spring parts (110, 120, 130).