A linear compressor comprising: a cylinder disposed in a shell; a piston configured for linearly reciprocating inside the cylinder; a linear motor assembly for exerting a driving force on the piston; a suction muffler having a refrigerant passage for flowing a refrigerant therethrough, the suction muffler being configured to be linearly movable with the piston, wherein the suction muffler includes: a muffler main body movably accommodated in a muffler guide; a main body insertion part coupled to the inside of the muffler main body and having a variable refrigerant passage section; and a piston insertion part coupled to the muffler main body, being configured to extend into the piston, characterized in that: the linear compressor further comprises: a first support provided on an outer surface of the muffler main body and extending outwardly at an acute angle (θ 1) from the muffler main body; and a second support provided on the piston insertion part, the second support being coupled to the first support, and wherein the first support comprises: a coupling portion coupled to the second support; and a spaced portion spaced apart from the second support, wherein a spaced part is defined between the first and the second support (318, 358) for spacing the spaced portion of the first support from the second support. a cylinder disposed in a shell; a piston configured for linearly reciprocating inside the cylinder; a linear motor assembly for exerting a driving force on the piston; a suction muffler having a refrigerant passage for flowing a refrigerant therethrough, the suction muffler being configured to be linearly movable with the piston, wherein the suction muffler includes: a muffler main body movably accommodated in a muffler guide; a main body insertion part coupled to the inside of the muffler main body and having a variable refrigerant passage section; and a piston insertion part coupled to the muffler main body, being configured to extend into the piston, a muffler main body movably accommodated in a muffler guide; a main body insertion part coupled to the inside of the muffler main body and having a variable refrigerant passage section; and a piston insertion part coupled to the muffler main body, being configured to extend into the piston, characterized in that: the linear compressor further comprises: a first support provided on an outer surface of the muffler main body and extending outwardly at an acute angle (θ 1) from the muffler main body; and a second support provided on the piston insertion part, the second support being coupled to the first support, and wherein the first support comprises: a coupling portion coupled to the second support; and a spaced portion spaced apart from the second support, wherein a spaced part is defined between the first and the second support (318, 358) for spacing the spaced portion of the first support from the second support. the linear compressor further comprises: a first support provided on an outer surface of the muffler main body and extending outwardly at an acute angle (θ 1) from the muffler main body; and a second support provided on the piston insertion part, the second support being coupled to the first support, and a first support provided on an outer surface of the muffler main body and extending outwardly at an acute angle (θ 1) from the muffler main body; and a second support provided on the piston insertion part, the second support being coupled to the first support, and wherein the first support comprises: a coupling portion coupled to the second support; and a spaced portion spaced apart from the second support, wherein a spaced part is defined between the first and the second support (318, 358) for spacing the spaced portion of the first support from the second support. a coupling portion coupled to the second support; and a spaced portion spaced apart from the second support, wherein a spaced part is defined between the first and the second support (318, 358) for spacing the spaced portion of the first support from the second support.