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 . <EOS>