A linear compressor comprising: a shell that comprises a refrigerant suction part; a cylinder provided within the shell; a driving assembly including a piston assembly, a magnet assembly and a supporter, wherein the piston assembly includes a piston for reciprocating within the cylinder, a flange extending at one end of the piston, a balance weight mounted on the rear of the flange and a suction muffler installed in the center of the piston, wherein the magnet assembly includes a cylindrical magnet frame, a permanent magnet mounted on outer circumference of a magnet frame, a fixing plate fixed to a side of the magnet frame for supporting an end of the permanent magnet and a support member for supporting another end of the permanent magnet, and wherein the supporter is configured for supporting the piston; a motor assembly for providing a driving force for a motion of the piston; a frame which is engaged with the cylinder to support the motor assembly; a motor cover which supports one side of the motor assembly; and a spring provided between the supporter and the motor cover, wherein the magnet assembly is configured for delivering the driving force exerted by the motor assembly to the piston, wherein the magnet assembly is configured to have greater mass than the supporter and the piston assembly, and wherein the frame comprises a contact part to absorb impact when the frame is directly collided against the support member. a shell that comprises a refrigerant suction part; a cylinder provided within the shell; a driving assembly including a piston assembly, a magnet assembly and a supporter, wherein the piston assembly includes a piston for reciprocating within the cylinder, a flange extending at one end of the piston, a balance weight mounted on the rear of the flange and a suction muffler installed in the center of the piston, wherein the magnet assembly includes a cylindrical magnet frame, a permanent magnet mounted on outer circumference of a magnet frame, a fixing plate fixed to a side of the magnet frame for supporting an end of the permanent magnet and a support member for supporting another end of the permanent magnet, and wherein the supporter is configured for supporting the piston; wherein the piston assembly includes a piston for reciprocating within the cylinder, a flange extending at one end of the piston, a balance weight mounted on the rear of the flange and a suction muffler installed in the center of the piston, wherein the magnet assembly includes a cylindrical magnet frame, a permanent magnet mounted on outer circumference of a magnet frame, a fixing plate fixed to a side of the magnet frame for supporting an end of the permanent magnet and a support member for supporting another end of the permanent magnet, and wherein the supporter is configured for supporting the piston; a motor assembly for providing a driving force for a motion of the piston; a frame which is engaged with the cylinder to support the motor assembly; a motor cover which supports one side of the motor assembly; and a spring provided between the supporter and the motor cover, wherein the magnet assembly is configured for delivering the driving force exerted by the motor assembly to the piston, wherein the magnet assembly is configured to have greater mass than the supporter and the piston assembly, and wherein the frame comprises a contact part to absorb impact when the frame is directly collided against the support member. wherein the magnet assembly is configured for delivering the driving force exerted by the motor assembly to the piston, wherein the magnet assembly is configured to have greater mass than the supporter and the piston assembly, and wherein the frame comprises a contact part to absorb impact when the frame is directly collided against the support member.