A linear compressor according to an aspect of the present invention includes a cylinder defining a compression space, a piston having suction holes through which a refrigerant is introduced into the compression space, a suction muffler which is connected to the piston and through which the refrigerant supplied to the piston flows, wherein the suction muffler includes a seating part seated on one side of the piston, and a protrusion arranged inside the piston, and the protrusion includes flowing pipes extending from the seating part to an inside of the piston to guide the refrigerant to the suction hole, and a resonator arranged on one side of the flowing pipe and having a resonance space therein.